The investigation into Stonetree's recent shooting of a perp is keeping him up nights. Meanwhile Nick confronts a ghost of his own -- one that's about 300 years older.

Nick joins the Luminology cult to investigate the death of a city official's son. When he inexplicably breaks off contact with the department, however, Natalie infiltrates Luminology's headquarters and discovers that Nick has been brainwashed.

When Nick saves Schanke's life during a fire fight, Schanke can't help but notice Nick has taken up flying. Despite Nick's hypnotic suggestion to forget what he saw, Schanke begins investigating Nick's past. Natalie can't deflect him and Janette's attempts to hypnotise him fail. The trail soon leads him to conclude his partner is a vampire and from there to LaCroix. The question is, what is LaCroix going to do with the inquisitive Schanke?