Max and JC escape from a laboratory to Woodchuck Wood; they discover a new environment of which they know nothing, attracting the wrath of Mayor Woohoo, who ends up being touched by the friendship of the two friends.

In order to buy a television, Max and JC offer to make muffins for the mayor's celebration, but the muffins are inedible and the celebration turns into chaos.

To become popular, JC hastens to distribute the Biono kicks that Max made while keeping all the glory; the shoes derail and create chaos in the city.

Max, JC, Mona, Abby and Pickles start off on the ascent of Molehill Mountain, but everything gets complicated when JC takes the lead and misplaces them while Max is getting rusty.

As Mona tries to make her dream come true on stage, JC steals the spotlight by catching the director's eye.

Max and JC decide to turn themselves into thieves in order to give Pouic-Pouic something to do.