Hired as guards to protect an antique shop, Joe and Jim run into a gorilla who has been trained by a gang of thieves to rob the store.
Joe Besser and his pal are assigned by Tom Kennedy, head of the Wide Awake Detective Agency, to guard the Jeweler Antique Building, which a mysterious gorilla has been looting. After a battle involving guillotines, dummies and devil-masks, the two catch the gorilla, plus the two crooks who have master-minding the gorilla's activities.—Les Adams <longhorn1939@suddenlink.net>