Take pleasure in high-sea thrills as Barbie, Chelsea and the remainder of the Roberts household set sail on an journey cruise. "Barbie & Chelsea The Misplaced Birthday" tells the story of Chelsea, Barbie’s precocious youngest sister, and the remainder of the Roberts household as they set sail on an journey cruise for her seventh birthday. After they cross the Worldwide Date Line, Chelsea discovers her precise birthday has been misplaced and he or she embarks on a fantastical journey via an enchanted jungle island with the intention to put it aside.