Kang has a terrible accident while wandering a vacant tunnel.
Deep in the forest, a man and woman have been brutally attacked in a cabin and left to die. Arriving too late, Kang chases the killer only to be hit by a speeding car. Barely surviving surgery, he now finds himself a prime suspect. He cannot shake the feeling that there are strange gaps in his memory regarding that night and the killer's identity. While police set out to confirm his story, he begins his own quest to remember the truth about the murder and himself.