While consoling Helen, the widow of Blackie's detective friend Joe Kenyon who died in a suspicious auto accident, Blackie and The Runt offer their services for a security job. They are tasked with securing an extremely expensive pearl necklace for a wealthy client named Mrs. Carter. When the pearls turn up missing Blackie and The Runt become the prime suspects and must clear their names and find the real culprit along with any connection to Joe Kenyon's suspicious death.