The Bloody Valentine has been terrorizing the streets for years. Despite all their hard work, the FBI hasn't seen heads or tales of him. Despite never meeting, that doesn't stop Dean Winchester from dropping notes in the blood of his victims to whatever poor soul had the misfortune of being assigned his case. Next to murder, teasing them is his favorite pastime.
But his feelings change when he meets Castiel Novak, the agent looking for him, and he realizes he may not hate the human race quite as much as he thought.
Sam and Dean Winchester take a case in sunny Santa Barbara, California. It gets a little more complicated when a psychic detective shows up.