Dum-Dum, Wacky, Creeps, Fingers: They're just a few of the hoodlums in the world of amateur sleuths and professional bon vivants Nick and Nora Charles. And now there's a new hood: parenthood. A birthday party - make that boithday - that some of da boys hold for infant Nick Jr. is part of the fun in this third film in the witty series. The case begins when the Charles family arrives for a weekend with a Long Island industrialist who fears someone wants to kill him. Sure enough, his fears come true. Nick (William Powell) is among the suspects. Asta scrams with what may be the murder weapon. And Nora (Myrna Loy) has her own ideas about the case and sneaks off to a nightclub to ferret out a clue. "Madam, how long have you been leading this double life?" Nick asks. "Just since we've been married," she replies.