Crossover with The Professionals. "Nick explains that vampires are really aliens. All seems well, but LaCroix is plotting revenge, together with D[oyle]'s twin brother Stephen. What B[odie] did to Nick to "upgrade" him is forbidden, so LaCroix has an excuse to attack B. He injects B with a virus lethal to vampires and wont give him the vaccine unless B swears obedience. As LaCroix helped Radu to kill B's family, B tries to refuse, but has to give in at last. LaCroix also kidnaps Natalie, who also gets the virus. Nick and D look for their lovers, helped by Brendon, B's grandson, who is held slave by LaCroix. There is a fair bit of sex among all the characters, for one reason or another, and some issues left unresolved (for a sequel?) but in the end all ends well."