Snagglepuss, a stowaway on a voyage to England, is tossed overboard by the irate skipper. He manages to get ashore on a bleak coast. But the castle in which he seeks wealth and shelter is haunted. The ghosts, Harem and Scarem, decide they haven't had this much fun in 900 years, as they make Snag's life miserable.

When an escaped circus gorilla appears to have gone on a murderous rampage, a threatened attorney calls on the detective trio of Garrity, Harrigan and Mullivan to act as bodyguards. In short order, we discover that there is more to the attorney than meets the eye, and the ape may be innocent after all. When a pretty young heiress faces peril, it’s up to our heroic trio to save the day.