The investigation into two disappearances leads Stone and Briggs to a rich and bored brother and sister, who are playing a bizarre and possibly deadly game.

After Dan responds to a beautiful secretary's request for help, they both wind up in the hospital near-death from an unknown poison, and Sam and Jim must search for both the poison and someone with enough motive to kill the girl.

A blind marine is out to get the two thugs who ambushed him and killed his wife, and Stone and Briggs set out to stop him.