At the tenth wedding anniversary celebration of the female protagonist Bai Li and her husband Ye Yunkai, she meets her college junior Su Yu, the male protagonist. At this time, Su Yu is Ning Mochen's boyfriend. Ning Mochen schemes to let the female protagonist find out that her husband is cheating with her. Later, the female protagonist and the mistress fall into the water and their souls are accidentally exchanged. The female protagonist wakes up with the mistress' soul and begins her revenge. The first wife of true love exchanges souls with the vicious mistress, putting on a façade to turn the tide.