Mystery, Inc. heads to Blowout Beach for a real swinging beach party when the Ghost Pirates threaten to harsh the good vibes.

Mystery writer Cornelia Van Gorder has rented a country house called "The Oaks", which not long ago was the scene of some murders committed by a strange and violent criminal known as "The Bat". Meanwhile, the house's owner, bank president John Fleming, has recently embezzled one million dollars in securities and has hidden the proceeds in the house, but is killed before he can retrieve it.

Many interested parties are after the loot from a factory payroll heist but the mobster who hid it has amnesia after undergoing experimental brain surgery in the prison hospital.

A retired judge who opens a private detective agency and her ex-con associate try to track down $750,000 in bank robbery loot.

A dishonest lawyer devises a scheme to rob a bank by recruiting criminals he has represented to do the job for him. When the robbery is completed, he learns that the "loot" from the vault is in fact a microchip containing top-secret information.

A young married couple whose plans for their life together haven't turned out as expected decide to rob the bank where the husband works of $100,000, then hide the money in a safe place and return for it after they serve out their sentences. All goes according to plan until they get out of prison, when they find that they're being trailed by an insurance investigator and the husband's old cellmate, who has decided that he wants a cut of the money.

A publisher bets an author that he won't be able to write a romantic adventure novel while on a walking trip from New York to San Francisco.

An embezzler who expects to serve his time in prison and then pick up his buried loot is in for a surprise.

University professor George Kingsley is struck by gangsters while crossing the street, leaving him with brain damage and one of the gangsters, Cannon, paralyzed. Kingsley's friend Dr. Sovac attends to both men, and when Cannon offers him a reward for aiding his recovery, Kovac transplants part of Cannon's brain into the dying Kingsley's skull, creating a dual personality.