Every midnight in Su Lan is a morning in another world. In World A, she is a calm forensic doctor who focuses on giving voice to the voiceless; in World B, she is a genius criminal who is the most wanted criminal, cleverly evading pursuit and using her sins to control her destiny. The memories of the two worlds intertwine and penetrate, and the cracks in identity gradually tear open the boundaries of reality. When a serial murder case spanning a parallel world surfaced, Su Lan discovered that she was both a hunter and a prey. She tried to piece together the truth with reason, but she fell into the maze of fate step by step - each layer of the mystery she solved may make her doomed in another life. Can the truth penetrate the mirror of the world? Or is Su Lan already trapped in a cage of her own making? At the critical point where fate intersects, only choice can define her life, death and redemption.