Amateur sleuth, Zoe Mack, is thrilled when she lands her first paying case. Her excitement soon turns to dread. She becomes frantic when she realizes she'll be working up close and personal with blood, which makes her faint.
Zoe's boyfriend, Nate, joins her on the case. She's ecstatic to have him involved until a gorgeous co-worker gets a crush on him, and because they're undercover, Zoe can't tell her to leave her boyfriend alone. She begins to question Nate's loyalty even though he swears she's the only girl for him.
When blood begins to disappear at the blood bank where they're working, Zoe and Nate find themselves in danger at the hands of a terrifying adversary. Nothing is as it seems and no one can be trusted. Everyone's a suspect. Who's stealing the blood and why? Is it Zoe's boss? The beautiful Rikki, who has a thing for Nate? Or, a weird vampire-like coworker?