Barbie, her sisters and all of their puppies are out for an evening stroll on the boardwalk. They decide to go visit Barbie's friend Nikki, who works at a pirate themed mini-golf place called Crossbones. The evening takes a spooky turn when Nikki reveals that she thinks Crossbones is haunted!Luckily, no secret is safe from the super sleuthing sisters! Another major mystery for The Sisters Mystery Club.Come on an amazing adventure with Barbie and all her friends! Solve mysteries with secret doors, sea monsters and messages in a bottle, catch the baddies as a secret agent, sing in Barbie's rock band, celebrate Chelsea's birthday in Dreamtopia and fly to tropical beaches and distant planets in far-away galaxies. Let's go!