Chatfah, the youngest sister of the Bupphachinda family, has just received the largest share of her father's inheritance and is about to be married. However, Chatfah falls from the highest floor of a vacation home to her three older sisters' shocked eyes. When her body disappears, her three sisters—Baibua, Chomphu, and Picha—become suspects in her disappearance.
Sun is tasked by the father of Sairung, a woman with dissociative identity disorder, to make all five of her personalities fall for him in an effort to fix her. One of her personalities, Manmok, becomes determined to throw him out of their lives.