The amnesiac youth killer Yue Yao finally embarks on her first killing mission at the age of sixteen, where she is ordered by her master to assassinate the ruthless General He Yunxing of the Fourteenth Government Office. Yue Yao sneaks into the general's mansion but fails to assassinate He Yunxing, and she is even tricked by him into becoming his newly-married bride! In order to complete the assassination mission, Yue Yao plays along and assumes the role of He Yunxing's newly-married bride. Soon, a series of murders occurs in the general's mansion, and Yue Yao becomes the first suspect. Stimulated by the bloody murder, Yue Yao gradually begins to recover her lost memories, unaware that she has already been embroiled in a shocking conspiracy.