Oz, an irresponsible man baby, nearly misses his girlfriend’s graduation because he’s too busy playing with toys. Before he can make amends, a mysterious package arrives containing a mangy hand puppet. Despite the pressing need to be there for his girlfriend, Oz can’t resist first trying on the puppet and, to his shock, his soul is instantly imprisoned in its soft foam body. Regaining consciousness as a sentient foot-tall muppet, Oz panics and tries in vain to return to the now-dying carcass of his human body from which he is still joined at the elbow. Enlisting the help of his soon-to-be-ex girlfriend, the situation soon spirals out of control and Oz winds up with his arm chopped off and getting dumped, in that order. To have any hope of saving his relationship, and surviving, he’ll have to do the one thing he’s always avoided: grow up.