Gangster Arnie Kurtz is moving into Chicago's South Side and Eliot Ness very much wants to nab him, putting a 24 hour watch and tapping his phones. The operation is put in danger however when Kurtz inadvertently becomes part of a public health emergency. Against his better judgment - but at his wife's insistence - he agrees to let her brother Benno Fisk deliver $100,000 to a New York mobster. Unknown to anyone, Benno has contracted Parrot Fever from a recently acquired pet and collapses soon after his arrival. Federal health official frantically try to trace the source of the infectious disease. For Arnie Kurtz it may mean trouble as he and his wife have been caring for Benno's pets while he is away.