This adventure of the Hardy Boys, Frank and Joe, deals with a local bank robbery. Two of their pals disappear after a masquerade-costume affair.

Frank, age sixteen, and Joe, age fifteen, are confronted with one of their most baffling cases. It becomes truly exciting to follow them as they seek a solution. Will they get it? If so, how? It becomes very exciting to follow them in their efforts as they try to live up to the exceptional detecting abilities of their professional detective father. For listeners to this story, it's definitely a situation of "listen and learn."