Episode 1
On a mission to clear his name, Jang Ho-jae searches for a mysterious woman. On the job, Chae-ok encounters a familiar person from decades ago.
Episode 2
While looking for the same person, Ho-jae ends up saving Chae-ok, who's being chased by a mysterious being. Ho-jae begins to wonder more about his past.
Episode 3
Chae-ok agrees to work with Ho-jae to find Seung-jo, but they soon find themselves in peril. Meanwhile, Chae-ok's monstrous instincts begin to surface.
Episode 4
Ho-jae tries to piece together everything that has been hidden from him. Chae-ok discovers that the atrocities of the past continue to the present day.
Episode 5
In his effort to save Chae-ok, Ho-jae makes a momentous decision. Having sustained severe injuries, they must battle through a treacherous escape.
Episode 6
After a test subject wreaks havoc in public, Jeonseung Biotech goes into damage control. Fate drives Ho-jae and Chae-ok to confront the company head-on.
Episode 7
As Ho-jae's enemy threatens to hurt those closest to him, he risks everything to protect them. Will he survive the ferocious beasts and save Chae-ok?
