Li Ya’er steps in to receive his father’s bride, but the wedding night turns horrific when the bride mysteriously burns to death and assassins leave him injured, amnesiac, and sold into slavery. As a buried conspiracy exposes his true identity, he becomes entangled in a turbulent master-servant romance that puts them on opposing sides. Together, they unravel the plot threatening the Tang dynasty and fight to protect both the realm and the fragile bond between them.