A rich man named Adnan marries Bihter, who is younger than him. A poisonous forbidden love begins between Adnan's nephew Behlül and Bihter who lives in the same mansion.

Adnan is a reputable, wealthy businessman whose wife passed away eleven years before. He was left with two young children and devoted his life entirely to their care, as well as bringing up his nephew Behlul who lost his family in a car accident several years before. When Adnan marries Bihter, who is younger than him. A poisonous forbidden love begins between Adnan's nephew Behlül and Bihter who lives in the same mansion.