After a banquet, Zheng Yan, the Fourth Young Lady of the Zheng family, is pushed into a river by someone. Although she is rescued, her soul separates from her body, leaving her as a lonely spirit whom nobody can see or touch. Following a faint glimmer of light, she finds herself beside Pei Yan, the feared commander of the Black-Clad Bureau. Only when she is near him does she stop feeling cold. Once the heir of a distinguished military family and now a cold, taciturn man of power, he appears indifferent to her, yet secretly sends people to investigate her whereabouts and keep watch over her safety. As a living man and a wandering soul cautiously test each other, Zheng Yan searches for a way to return to her body while uncovering the truth behind her mysterious fall into the river that night.