Ding You is a contracted writer for a publishing house. One day she received a package from a person named Yang Manni, which contained a bracelet that was exactly the same as hers. The other party asked her to save her, saying that she was Ding You's sister.
Ding You never knew that he had a sister, but he still went to the appointment as requested. After meeting, he found that a woman who looked exactly like him was dead and lying in a pool of blood...
Who is she? Who killed her?
In addition, Ding You is also entangled with a married man, whose indifference makes her suffer. How can Ding You find his own way out of this lost relationship?
Due to the emotional entanglement and the transformation of the two actors, can Ding You finally find the murderer and gain his own happiness?