Woo-jin, Ji-oh's childhood friend and secret crush, is possessed by a ghost after a car accident on a day of heavy rain.

Ji-oh can't just stand by. Woo-jin was his savior, the one who helped him turn his life around when he was going astray. Determined to get Woo-jin's body back, he decides to team up with Kyun-woo, a man with spiritual abilities.

After many twists and turns, they manage to temporarily expel the ghost. However, Woo-jin's spirit and the ghost's begin to flicker, switching places unpredictably.