The genius designer Ruan Qingqiu discovered her fiancé Fu Sili's affair with her best friend Xia Yiyi on the eve of her wedding and was harmed into a vegetative state. When on the verge of death, she met the Dark Night Messenger Han Xingye, signed a demonic pact with him, and possessed Jiang An'an's body to seek revenge. The pact gradually turned into a heartbeat pact.
