Lin Youwei gives her husband, Xiu Yuan, an amnesia drug on his birthday so he will forget her while she marries her terminally ill childhood friend, Xu Sheng. Youwei, unaware that there is no antidote, plans to remarry Xiu Yuan in three days. While Xiu Yuan grapples with his memory loss, Youwei eventually discovers that Xu Sheng faked his illness and imprisoned him.
