The Super Happy Party Bears are in awe of their new friend, Butter, a groovy caterpillar who's got the moves. This Jitterbug can breakdance, tango, and boogie-woogie. Butter becomes an honorary Super Happy Party Bear dedicated to being goofy and spreading the party spirit! When Butter mysteriously disappears, the bears frantically search for him, only to discover that the Jitterbug has morphed into a beautiful butterfly! The bears must accept that jitterbug has grown up and must follow his own fluttery path.