Cycle

A dark night in a small town, a massive trailer truck speeds in recklessly, swerving dangerously before crashing into a guardrail and overturning. Doctor Sejin, having taken a wrong turn, stumbles upon the accident scene. What she finds is a man still alive, despite having a metal pipe impaled through his head... A perfect medical anomaly, something no ordinary human could survive. To Sejin, the man was nothing short of a miracle sent from above. Determined to use him as an experimental subject, Sejin takes the man and saves his life. Before long, the man regains consciousness. His name: Lee Taesu. He is in a "perfect state"—complete with amnesia. Though confused by the contract Sejin presents him, Taesu adds his own condition: Sejin must also help him recover his lost memories. As Sejin observes Taesu's astonishingly rapid healing, he is left in awe. But soon, strange phenomena begin to manifest around Taesu, setting off a chain of unforeseen events...

(Source: Kakao Entertainment Corp., translated)