Eight-year-old Lucas, Prince of Wrenly, is eager to explore and Clara, daughter of the queen's seamstress, knows the kingdom well, so they team up to find a lost jewel and visit all of the land's main attractions as they search.
"It's been raining non-stop for six whole days. Someone has cursed the Kingdom of Wrenly. Can Lucas and Clara figure out who's behind the evil spell and stop the villain before it's too late?"--
Barbie is a shipwrecked princess who, raised by a red panda, a peacock, and a baby elephant, knows nothing of other humans until an adventurous prince discovers her tropical paradise.
Lucas and Clara are floating on a raft when a wave casts them into the sea, where Lucas catches a glimpse of a coral kindom and a dark-haired mermaid helps him, but when his father, King Caleb, hears of this, he scolds Lucas and tells him he has broken an age-old pact.
As diverse subjects of Wrenly gather from far and wide to participate in the kingdom's Grand Tournament, a rude squire declares that girls cannot be knights, which makes Clara determined to prove that she can be anything she wants as long as she works hard enough for it.