女演员李采薇穿越到古代，夺舍痴傻世子妃，她与世子沈怀瑾自幼订下婚约，但沈怀瑾每到大婚前就会无故暴毙，李采薇则陷入“夫死妻随”的无限循环。为了保命，李采薇开启了宅斗追凶，自己也逐渐爱上了“伪纨绔”世子。

女主角李採薇因男主的死進入開啓無限流循環穿越。李採薇與平陽王世子沈懷瑾自幼定下婚約，但沈懷瑾在成親前一天暴斃，由此進入循環。採薇再睜眼時發現時間回到大婚前一天，她剛準備去找沈懷瑾時，卻聽到他已經毒發身亡，李採薇被送入靈堂殉葬而死亡。而進入第三次循環，李採薇決定逃出王府，路過假山時聽到有人談論毒殺沈懷瑾，正當她想要靠近時，被人從身後一刀穿胸。第四次醒來李採薇回到大婚前十天，她決定速速跑出王府，半月後，包袱丟失的李採薇衣衫襤褸、瘸著腿被官兵追趕，沈懷瑾還是在大婚前一天暴斃了，李採薇拒絕遵從禮法女德，選擇跳崖。第五次醒來，李採薇決定與沈懷瑾形影不離，由此開啓了一段「歡喜冤家」的雙向奔赴之旅。

Actress Li Wei Wei time travels to ancient times and takes the place of the silly princess Li Cai Wei, who is engaged to Shen Hua Jin. But on the day before they are scheduled to marry, he's murdered. Suddenly she finds that they are all stuck in a time loop, and so Hua Jin and Wei Wei try to save him and break the time loop by solving who is targeting him and why.