Excited about celebrating her 7th birthday, Chelsea embarks on a fascinating cruise adventure along with Barbie and the rest of the Roberts family. However, after crossing the International Date Line, Chelsea realises that they skipped an entire day instead of gaining one hour. Now, to save the day, the girls visit an enchanted nearby island, where beautiful surprises, new friends, and exciting experiences await them. But can they save the lost birthday?—Nick Riganas