Love Monster visits Dr Piggles on Ha Ha Ha Day, only to find that his friend has the hiccups and is unable to make his patients laugh. Dr Piggles asks Love Monster if he can fill in for him while he rests, assuring him that he'll be right there to help out. But when the hiccups get worse, he has to lock himself in the back room, and Love Monster must find ways to make all the patients laugh by himself.