Surprise for Princess Ellie

Princess Ellie is pony-mad! The palace is buzzing with preparations for the royal jubilee party, but all Ellie wants to do is sneak off to the stables. Ellie is worried about Starlight. There's something wrong and Meg, the palace groom, won't tell her what it is. To take her mind off it, Ellie goes for a ride on the beach with her friends. But then disaster strikes. Will they get back in time for the party, and will they ever find out what's wrong with Starlight?