When he was seventeen years old, Shen Man, whose parents died, was adopted by his distant uncle and lived in an old house in a southern mountain village. The house leaked and it rained all night. In order to protect the housing base, she was forced to obtain a "fake marriage" with her uncle's adopted son, retired wounded soldier Gu Changchuan. He was cold and taciturn, and lost his memory due to trauma on the battlefield, but he always held her in his arms at night and murmured "sister-in-law." They lived in the same house and shared beds, and made a three-part agreement. Rumors spread and the villagers accused him of incest. She clenched the corners of her clothes tightly and did not dare to move. He avoided his gaze and blamed himself. Due to policy oppression, ethical shackles, and identity mystery, the two were pulled on the edge of taboo. But when memory fragments emerge, birthmarks overlap, and the battlefield diary reveals the mystery of one's life experience, was that marriage a substitute for a wrong love, or was it destiny?
