A son tries to restore the honour of his father, who was imprisoned during the 1980 military coup.

Tuna is going through hard times due to the psychological illness he suffers from. He tries to cope with the problems he faces with the support of his best friend Berkin. Meanwhile, Tuna begins to develop an emotional connection with Selen, his neighbor and college friend. This unexpected romance causes the strong friendship between Berkin and Tuna to break down. The serial murders that begin to take place around him drag Tuna towards a dangerous process. Developments that negatively trigger her illness and a trauma he experienced in her childhood cause Tuna to experience complex psychoses. Tuna struggles with the strange games his mind plays on him, while trying to live the love he feels in his heart. He will also have to struggle with Berkin, whose presence turns her into a troubled friend.

5 friends take a road trip to visit the caves within the Gomeda valley. Little do they know that these caves are still haunted by memories of torture that took place in the past. As they get closer, one by one, their dreams turn into nightmares, their nightmares turn into hallucinations, and their hallucinations turn into reality until the line between real and surreal exists no more: The valley begins to resemble the mother's womb, and the caves begin to resemble the umbilical cord between the mother and her unborn child. The memories of torture give way to the ever-haunting presence of guilt and regret that could only be felt by a mother.

We have entered a new era...The Antichrist, whose coming has been announced for centuries, is now born. Humankind is meant to be thrown in a vortex of fear and despair. While seeds are being planted somewhere in the heart of Istanbul, Turkey, all prophecies are coming true. Evil will spread like a virus throughout the World. Satan will find a body in which to incarnate and prepare to reign of terror at the head of an army of Devils. DECCAL is the first of a trilogy meant to represent the pure essence of evil.