A university student named Du Shen (played by David Lee) is an avid reader of psychology and dreams. One day, he meets a new student, Zhen Hao (played by Nam Woo), who introduces him to the fascinating world of hypnosis. Du Shen is instantly captivated by the idea of using hypnosis to unlock hidden memories and understand his past experiences.
Determined to explore this newfound skill, Du Shen begins working with Professor Cui (played by Baek Kyung-ho) to learn more about hypnosis. Together, they delve into the techniques and theories behind the practice, determined to use it as a tool to unravel the mysteries of his own mind.
As their sessions progress, Du Shen begins to experience strange occurrences around campus. He witnesses mysterious disappearances and encounters bizarre events that seem to defy explanation. His friends begin to fall prey to similar phenomena, leading to a growing sense of unease among them.
With each passing day, Du Shen's interest in hypnosis deepens, but he soon realizes that the power of suggestion has taken on a life of its own. The memories and emotions that surface during hypnosis are not always what he expects or wants.
As he confronts the reality of his own subconscious mind, Du Shen must grapple with the ethical implications of manipulating his own thoughts and emotions through hypnosis. With Professor Cui's guidance, he sets out to uncover the true purpose behind the hypnotic trance and the dark secrets that lurk within the shadows of his own mind.