Mike and Stu the Ninja return to Stumpville to make amends for the truck they stole from Bob's TV and Bridge Repair Service. But when Bob learns that the truck was destroyed, he subjects Mike and Stu to the worst punishment imaginable: working for him...forever! If they refuse, Bob will fabricate enough criminal charges against Mike and Stu to put them away for life. On top of that, Mike is being stalked by a dangerous menace out for revenge!
Just when things can't seem to get any worse, Mike and Stu uncover a terrible secret that could mean certain doom for the residents of Stumpville, and perhaps the entire world. Can Mike and Stu escape Bob's clutches and save the city without putting in any overtime?