While hiding from society, a reclusive genius novelist Je Moon-jae falls victim to identity theft - only to be confronted by his doppelganger.

Noja uncovers the world of identity laundering after Moon-jae escapes his grip. Meanwhile, Detective Park Sun-yong pieces together the link between them.

Suspicious but intrigued, Noja takes Moon-jae on as both a client and a hostage. Their uneasy alliance leads them to setting up a carefully planned trap.

Moon-jae suspects The Rat may be a figure from his past. Following his newly recovered memory, he and Noja head to the island where the man once stayed.

A shocking tie surfaces between Noja and The Rat, while Sun-yong closes in on crucial evidence. Later, The Rat appears publicly, cornering Moon-jae.

Moon-jae reaches out to his longtime editor, hoping she can vouch for him. Lost in confusion, a text from Noja becomes his only lifeline.

After barely escaping, Moon-jae joins a frantic race for someone who can reveal his identity. Later, Sun-yong discovers a shocking truth about his past.

Moon-jae sinks deeper into trouble. Sun-yong heads to a nursing home for answers - only to find his witness gone. Later, Noja's past buries him alive.

Moon-jae evades police to meet The Rat where it all began. Noja leaves him with heartfelt advice as Sun-yong continues to pursue a key witness.

Moon-jae stands at the center of a trap a lifetime in the making. Every lie and stolen identity surfaces as he questions: Is he the predator or the prey?