Prosecutor Ji-wook is mistaken for a molester by Bong-hee on the subway. Bong-hee then finds out her boyfriend is cheating on her, so she goes out with Ji-wook to drown her sorrows. Three months later, they reunite and Ji-wook cannot stop thinking of her despite treating her coldly. Suddenly, Bong-hee is arrested on suspicion of murder and Ji-wook investigates her case.