While Muddy was underground, the local groundskeeper, Jinbe, captured his children and his wife and ran off with them. When he finally pops up out of the ground, an elderly mole tells him about what happened and Muddy runs off to save his family.
Jinbe, however, sets traps, and has hordes of lackeys out to capture Muddy. But fortunately, Muddy, using his ability to dig underground, can hide himself from enemy attacks and bypass fences or barriers. As Muddy gets closer to Jinbe, the traps get more dangerous, but Muddy continues onward. Along the way, he pushes around bombs and collects cabbages.
For each of Jinbe's lackeys that Muddy defeats in battle, one of Muddy's children is released. Jinbe is the final confrontation, and by defeating the gruff man, Muddy is able to save his wife and return home with his seven children.