One morning, on what seems like an ordinary beach day, Barbie, Skipper, Stacie, Chelsea, and their loyal puppies are faced with a major mystery - Raquelle’s missing jewelry! Is a thief, a seagull or something else entirely? Luckily the super sleuthing sisters are on the case, as no secret is safe from 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.