Ten years ago, Cedric Shaw and Iris Sterling were in love but forced to separate due to political conflicts. Iris's father was framed, leading Iris to marry a marquis to avenge her family. Five years later, Cedric returned as Prince Regent, forcing the marquis to send Iris to him as a concubine. Poison caused their souls to swap. Trapped in each other's bodies, they ally to swap back, uncover the wrongful case, and unlock secrets about their past relationship and power struggles.