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?

Surprising confessions come to light as Brooklyn and Malibu team up to protect precious cargo aboard a speeding train headed back to England.

With the competition looming and Pepper still on the loose, the Carsons need another horse — and someone to ride her. The gang sets a trap for Giovanni.