Marvin is a somewhat dorky 8-year-old kid with a lot to prove. The bullies at school taunt him, his friends are not very helpful and all he wants is to just belong. So in an attempt to solve his problems, Marvin gets an idea: Karate lessons! Will he emerge Karate Cool and ready to take on all of William Clarke Elementary?
Marvin falls hard for the new girl: a feisty nine-year-old named Tokiko, who turns out to be a Karate whiz! But when Hank tells everyone that Marvin has to be protected by a girl, Marvin must defend his honor. So he enters a citywide Karate contest to prove himself. Expecting to lay the smack down on trash-talking Hank, Marvin finds himself in competition with his crush! With stakes this high, can Marvin keep his Karate cool?
