Marty's eccentric old aunt, Clara, unaware of his death, comes to the agency, seeking a bodyguard to accompany her to the roulette tables of Monte Carlo where she hopes to put into practice her foolproof winning system. Jeff and Jeannie go with her and she wins a fortune but two gangs, one British, one French, are after her secret and steal her 'little red book' though this proves to be worthless as her system is in her head. When heavies abduct Jean, the best way to save her seems to be to show that Clara can lose as well as win, requiring Marty to 'doctor' the roulette wheel.

After Anne Fenwick is killed by gold-digging boyfriend 'Bunny' de Crecy, her niece Julia, unaware of Anne's fate, asks Jeff to locate her, telling him that she attended a seance given by Madame Hanska every week. Jeannie poses as a recent widow wanting news of her husband but Elliot, a man who befriends her, exposes her to Madame Hanska, as Marty discovers. Marty 'appears' to the medium and frightens her into admitting the scam whereby she sends lonely rich women into de Crecy's clutches and Jeff confronts him in the room where he killed Anne, with Marty contributing to an explosive situation.