When Tommy, Chuckie, Phil, and Lil see a commercial for the new Reptar video game, they immediately decide they are already in one. The game is whatever they say it is, the house is whatever level they need it to be, and the rules are whatever rules make the adventure work. Classic Rugrats energy applied to a video game world that exists entirely inside a group of babies' collective imagination — which means anything can happen, and usually does.