Frank is up to his usual shenanigans when a Colonel arrives for treatment after nearly being killed by a tank. He has a prized possession, a collectible Colt 45 revolver. It is taken from him when he arrives and put in storage. But Frank is with Radar when he puts it in the locker and soon he is showing it to Margaret, pretending it is his. This puts the camp in an uproar, looking for the prized firearm. The sad thing is that since Radar had the keys to the locker, he is seen as responsible, even though his keys were probably "borrowed" while he slept. Potter says he could get fifteen years in the stockade. This seems a bit cruel since Potter knows Radar would never have stolen the gun. Anyway, it is devastating news to O'Reilly. The question is how to get Frank to return the gun.
