Ahmet Emin, who terrorized the neighborhood with his vagrancy and was not liked by anyone, is murdered. Superintendent Orhan and his assistant Selim investigate the scene, collect evidence and interview witnesses. Prof. Dr. Sevil Atasoy reaches scientific conclusions from the collected evidence. Was the murder motivated by theft? Did the incident occur during a petty neighborhood quarrel? Or is there more than meets the eye?

The body of a young woman found in the forest... Two cops on the trail of the Indian god Shiva... Superintendent Orhan and his assistant Selim will reveal who the body of a young woman found in the forest belongs to and why/how the murder was committed. A young and beautiful woman, luxurious lives, a lonely man who rejected his family for this woman...

The body of an unidentified woman is found in a construction site in Istanbul. Superintendent Orhan and his assistant Selim, on the one hand, try to identify the victim, on the other hand, they have to illuminate the murder. They soon find themselves in the middle of a tangled mess of relationships. All the evidence points to the victim's lover, but Orhan thinks there is something wrong with this.

Nurse Esra was 25 years old. On the morning of August 27, 2007, she was found seriously injured in the garden of the hospital where she worked. She was operated on right away. At first glance, it looked like a suicide. On the other hand, Superintendent Orhan and his assistant Selim had many questions to be answered. Did Nurse Esra really commit suicide? What did the words in the suicide note in her pocket mean? Why did Nurse Esra's fiancee Metin come to the hospital on the night of the incident? Why did Metin and Doctor Yalçın argue? What was the problem between Esra and her colleague Nurse Sevgi? Will Nurse Esra's missing diamond ring be found? Will the security cameras in the hospital be sufficient to illuminate the incident? And most importantly, will Nurse Esra, who was taken to the intensive care unit after the surgery, be able to survive?

Comic book collector Can Bıçakçı is found dead in his bed.

Socialite beauty Sibel Levent is found dead in the garage of a house. Since she is a well-known person, the event finds wide coverage in the media.

An unidentified corpse, heavily deformed from being in the water, is found off the coast of the Marmara Sea. The incident looks like a simple boating accident. Orhan and Selim, who set out to determine the identity of the victim, find themselves in the middle of a complex relationship that they did not expect at all. Now it's all up to uncovering the evidence that will separate the lie and the truth. And it will not be easy at all.

Osman Keser; Jeweler, 56 years old. His body was found mutilated. His head and genitalia were missing. When Superintendent Orhan and his assistant Selim set out to solve this brutal murder, they had a lot of question marks in their minds.

Şener Kahveci. One of Turkey's leading businessmen... He was found dead together with Filipino masseuse Ruth Mirando in the salon where he went to get a massage before a very important tender. Ruth's housemate, masseuse Amelia Cruz, who worked at the same massage parlor, had disappeared. While the doubts centered on the missing Amelia, the real question was who wanted to have Şener killed... Did Şener's number one rival, Korkut Eryılmaz, commit the murder? Or is it his son, Gürkan Kahveci, who wants to replace Şener? Was Şener's wife Suzan hiding something? Did Sevim Çiçek, the owner of the massage parlor, know anything about the murders? Did Demir Karakaş, the lover of the missing Amelia, have a hand in the incident?

An ex-con was found shot down in a car by the roadside. Murat Kapusuz was involved in a bank robbery a few hours ago. The robbers took the money and managed to escape… So how did Murat Kapusuz die?

Ateş Cevheroğlu, the son of one of Istanbul's deep-rooted wealthy family and Chairman of the Board of Cevheroğlu Holding, was found shot in the forest where he often went hunting.

Aslı Ulubay. 22 years old, photography student. She was found bled to death in a building under construction, her hands and eyes blindfolded. Shee had multiple cuts on her body.

Büşra Erman is 20 years old. Theater student. She was found in the girls' dormitory, in her own room, shot dead in the face with a single bullet. Superintendent Orhan and his deputy Selim took action to shed light on Büşra's death, which was seen as a murder of jealousy at first glance. Was Büşra really killed by her jealous lover Cenk? Did Cenk, regretting what he did, commit suicide? This time, Superintendent Orhan and Selim had to answer the questions of the masterfully planned double murder. Moreover, they were faced with a murderer who was careful not to leave any evidence behind.

A prostitute nicknamed Sevtap was found choked and gagged in a hotel room in the back streets of Beyoğlu. She had one hand cuffed to the bed and badly beaten before she was killed. There was not the slightest clue about her true identity. A second female body was found as the investigation continued, further complicating matters. Another prostitute, nicknamed Mimosa, was badly beaten and strangled, just like Sevtap. DNA belonging to the same man was found on both women. Are Superintendent Orhan and his deputy Selim facing a serial killer who kills prostitutes? And most importantly, will they be able to catch the murderer before he commits another murder?

Zehra Yenel was 25 years old. She earned her living as a tailor at home. She was found dead in the entrance of her apartment building. It didn't take long to realize that what seemed like an accident at first glance was murder. Investigating Zehra's death, Superintendent Orhan and his deputy Selim found themselves in an interesting puzzle. Cevher, the last medium Zehra went to, who was depressed with the sudden disappearance of her sister Ayşe two years ago and never stopped looking for her sister, told Zehra quite surprising things about Ayşe. Where did this incredible talent of Psychic Gem come from? What was the big secret from two years ago to the present day? Who was Zehra's mysterious lover whom she did not tell anyone about but wrote in her diary?

An unidentified young woman was found dead on the seashore. She had two blows to the head, one fatal, and was wearing a man's shirt. Superintendent Orhan and his assistant Selim soon learned that the victim was Pelin Onur, a shareholder of Onur Real Estate Investment Trust, who had been kidnapped for ransom three days earlier. Fearing that her sister would be harmed, Pelin's sister and the other shareholder of the company, Gönül Onur, had paid the two million liras demanded by the kidnappers.
 Why did the kidnappers kill Pelin even though they got what they wanted? While Superintendent Orhan and his assistant Selim were trying to find Pelin's killer, a mysterious witness was after the money taken by the kidnappers.

The body of an unidentified woman was discovered in a flood after an incessant rain and unanswered questions... The victim had been killed with plastic handcuffs tied around her wrists and ankles, a hard blow to the head and a broken neck. Who was this Eastern European woman with tattoos? Were the expensive underwear she was wearing and the rare Mexican cactus flower attached to the hem of her dress enough to identify her? The plastic handcuffs on the young woman's wrists contained the blood of another woman. Was the woman whose blood was found in the handcuffs the murderer or another victim?

Ayça Peker, 27 years old. She was found stabbed to death next to her ex-lover Barış. That night there was a bachelor party at the house for Barış, who was about to marry Seda. And no one at home remembered exactly what happened that night! What happened at Barış's bachelor party? What did the stripper girl who was called to the house that night know? Did Berent, Barış's old friend, call Ayça home? Was Ayça really pregnant? Had Barış given up on marrying Seda? Did Arda, Barış's new best friend, know what was going on?

Timur Karadağ... 34 years old... Lead singer of the rock band Novus... On the night of the launch of the band's new album, he was found dead in his bathtub, electrocuted. It didn't take long to realize that what looked like an accident at first glance was murder.
 What had happened on the launch night? Was Timur going to get back together with his ex-wife Alev? Did his girlfriend Maya know about this? What was the reason for the fights between the band's guitarist Rüzgar and Timur? Was Timur planning to get rid of the record label and his manager Derin? What did Kenan, who wrote Timur's biography, learn?

Sude Şen... Model... 25 years old... She died as a result of a sudden heart attack during a catalog shoot for the new creation of the famous fashion designer Pars Tekin. It soon became clear that this attack was not due to natural causes. Sude was poisoned! 
So, who poisoned Sude and why? Did Pars Tekin's assistant Kaan know that Sude was going to be killed? Why had her lover Ozan left Sude? What was the secret that Erdem, a stylist and fashion editor, kept from everyone? Or had Sude paid with her life for her rivalry with her colleagues?

Complex relationships. Broken marriages. And death is approaching step by step… Ayla Sonmez. She was found drowned in the pool at the costume ball she gave at her home for her birthday. She couldn't got saved because of her extravagant costume. It was soon learned that the cause of death was anaphylactic shock, which erased the possibility of an accident. Who wanted to kill Ayla and why? Was Ayla the victim of a love she did not reciprocate? Why did she get in bad with her best friend? Who was Ayla's new lover that she was hiding from everyone?

Tülin Altınok. 41 years old. She was found dead at a Valentine's Day party organized by the association she was a member of! Behind her death, which at first seemed like an accident, many different possibilities emerged! Was Tülin Altınok killed by mistake or on purpose? Whose ring was found on her finger? What was the problem between her and the president of the association? Was her husband cheating on her? Was there a cold-blooded killer or someone with a guilty conscience?

In the backstreets of Beyoğlu, excessive alcohol, speeding and a painful scream that interrupts the darkness of the night! All Emine Çokuysal wanted was to send her sister to school and escape the cruel Istanbul. She lost her life in a traffic accident. While the drunk driver who caused the accident was arrested, it wasn't long before it became clear that there was something else behind Emine's death. Where was Emine staying, having moved from her place of residence? Had she fallen victim to gangs like so many other young girls who came to Istanbul on their own? Where was Emine's sister Funda, who had left her family in Mersin, saying she was going to join her sister in Istanbul? Or did she share the same bad fate as her sister?