Na Do-han, a man with Dissociative Identity Disorder, shares his body with four different identities. One dawn, he wakes up in a motel with blood-soaked hands and the word 'Run!' scrawled on a mirror. Soon linked to the disappearance of a wealthy corporate heir, Do-han becomes the prime suspect. Concurrently pursued by corporate lawyer Seo Hee-jae, he must interrogate his own identities, each concealing a secret.