Happy Birthday, Finn! The Knight of Springtime is turning 21, but instead of a pub crawl, he must find his way through Wonderland before he gets turned into a sheep! Nineva and Nerissa have planned a big surprise for Finn's twenty-first birthday. Before he knows it, Finn finds himself in a version of Wonderland, racing the Red and White Queens for his fondest birthday wish—of course, his Ladies can't know his true desires...can they? Will he best the Red Knight, find the White Rabbit's missing token, outsmart the Cheshire Cat, and win his princesses, before he gets turned into a sheep?