Another Back Up Plan

Best friends Prissy and Sissy have made it safely back to land, after being stranded for days on an island with murderous pirates, a mad sea captain, a dead body, and a monkey they've named Spot. Not only have they survived the experience, but they have spirited away a cache of pirate's treasure, made up of gold coins and diamonds. But just when they think they might be safe, the friends find a note slipped under the door of their hotel room. Someone else knows about the treasure - someone ...