While in France to promote his new book, Nick and Nora attend a Napoleonic-themed costume ball. Nick is told by the host he will commit a murder and challenges Nick to prove he committed the crime.
Barney once saved Nick's life. Now gangsters are after him and he wants Nick to hide him out. Things would be fine if Nora hadn't mistaken Barney's list of suspects for Nick's guest list for their housewarming.
A condemned murdered vows to return from the grave to avenge himself upon the jury that convicted him. When three of the jurors are found slain, Nick and Nora decide to investigate.
While playing with his new telescope, Nick spots a man behaving oddly on a nearby bridge. When he later meets the same man at a party for a visiting Middle Eastern diplomat, Nick suspects that the foreign dignitary is in danger.
Nick and Nora's new neighbor is an arrogant,unlikable piano genius who even throws things at Asta. When Nora pays him a visit, she ends up locked in a closet and the musical virtuoso murdered.
Nora comes home to find a blonde in her bed. Nick arrives soon after saying he has no idea who the blonde is or how she got in. The blonde (Nita Talbot) claims to have no memory of who she is and demands everyone get out of her hotel room.
Stelle and Belle, two dance hall hostesses, hire Nick to bribe a recently released con to leave their friend Gracie alone. Nora agrees with them but things go wrong when the con is found dead.
Nick investigates when the star of the play he's invested in is murdered. Nora insists on working with Nick because the dead man was found in her niece's apartment.
At a charity auction, Nora is auctioning Nick's detective skills for 24 hours. She has serious reservations when a beautiful amnesiac dressed only in a nightgown and fur coat wins the bid.
