Chae-ah Han and Yoon-soo Park may be perfect angels at church, but Chae-ah is really a foul-mouthed ex-convict, and Yoon-soo is... a vampire? When Yoon-soo blackmails Chae-ah with a murder she didn't commit, she begins searching for ways to escape the situation until the perfect opportunity presents itself. With Yoon-soo’s life now at her mercy, the two begin a life-or-death game of cat and mouse, only to find themselves falling deeper and deeper into each other's traps.