电视剧湄公河大案Yaşar, a young man, has a hard time after his father's death. His inheritance from his father causes Yaşar to have problems with his stepmother. Meanwhile, Yaşar learns that her sister-in-law, Canan, who is living in the same house, is in love with her. While Yaşar is dealing with the inheritance issue and his sister-in-law, he realizes that there are some strange events at home. Yasar's mentally disordered daughter Efsun's dark past is unearthed, making things even more complicated. The pain of the family, who had to face the dark past of Efsun, is just the beginning for them.