Professor Bufo trains Oso to load fuel canisters onto the rocket ship to help make it go. Oso tries getting the fuel to the rocket ship, but he goes too fast and the canisters fly off. That's when Oso gets a special assignment. A girl named Nadia is having a birthday party tomorrow, but she is too excited and can't get to sleep. Oso must teach her how to relax so she can fall asleep.