After an accident leaves Shen Mo with amnesia, he mistakes Ji Mingxuan, the man who saved him, for his lover. But when Shen Mo regains his memories, the six months they spent loving each other become completely erased. Desperate to keep Shen Mo by his side, Ji Mingxuan proposes a three-year ""contract lover"" arrangement. When two people are already in love, can a contract still keep their hearts in check?