Old Mother Riley has always had trouble with the spirits, but this time it's the ghost of infamous pirate Captain Morgan that's troubling her! She thinks he wants to sweep her off to bed, but really all he wants is to show her the location of his lost treasure map! Having found the map in the Captain's old bed, now she, daughter Kitty and an assortment of adventurers are bound for the deepest, darkest West Indies in search of a fabulous treasure trove! When their charter aircraft crashes, they find themselves in the strangest jungle ever, populated by lions, tigers. Crocodiles, penguins and public school-educated natives nicknamed 'Stinker'! If that weren't enough, the site of the treasure is guarded by voodoo-worshipping cannibals from a forbidden temple! How will the humble washerwoman from Ration Row cope in her wildest adventure ever?