The girls arrive at Carson Estate for a weeklong stay with Ken's wealthy aunt. But on their very first night, a prized horse and saddle go missing.

Everyone's a suspect, so the Barbies hunt for clues to clear their names. Are Lady Puddington's muddy shoes a sign of guilt — or just a fashion crime?

Denholm seems awfully suspicious... until Lady Carson reveals she might have a motive. Ken and Marcus arrive in London. Cassidy makes an unexpected move.

Brooklyn and Malibu follow Cassidy to Venice, where they're pulled into a fashion-forward side quest and reunite with an old friend.