It's Yuna's birthday, but she thinks everyone has forgotten...even Stitch! While preparing Yuna's surprise party, Stitch falls asleep and Hämsterviel sends Remmy to trap him in his own dreams, causing Stitch to get sick. Yuna and Jumba most go inside Stitch's head to catch Remmy before Gantu and Reuben capture him.

Jumba has developed a second and stronger Power Chip, one stolen by Delia. To test it, Hämsterviel uses it on Dupe so each duplicate made is stronger than the last. Stitch decides to use Dupe so that he can get out of his chores and trouble ensues.