In Seaford High school the new kid ,Jack meets three boys, Jerry, Eddie and Milton and a girl named Kim. They all do karate and Jack joins Jerry, Eddie, and Milton at lunch, and soon are picked on by Red belts in the Black Dragon Dojo and Jack tries to settle things and gets in a fight with kids from the rival dojo, the Black Dragons, that at the time, Kim was a member of the Black Dragons. Jerry Eddie and Milton learn from their sensei Rudy that the Bobby Wasabi Martial Arts Academy is in danger of closing. So Jerry, Eddie and Milton convnce Rudy to get Jack to join after he crashes through the wall. Rudy lies to Jack and says he will go to juvie if he does not join and helps them get 2 belts. Later Rudy let his secret slip and Jack quits until he hears the disapointment of his friends. Jack joins to win the tourtement. Jack competes against Kim, but after the Sensei for the Black Dragon cheats, Kim quits and does not fight Jack. Jack does a Bobby Wasabi move to win the tournament and keep the dojo running. Also in this episode, Kim from Black Dragon changes to Bobby Wasabi`s dojo.

The Black Dragons want to destroy the mall’s annual Halloween Boo-Stravaganza. Jack assures the others that he’s not afraid of anything, including the Black Dragons. A Clown from Circus Burger causes Jack to flip-out showing that he does have one fear - that of clowns. Now the Dragons will stop at nothing to use that fear against him. Rudy meets a catwoman and tries to find out who she really is. We find out that she's much closer to Jerry than Rudy!

Milton falls for Julie but when her uncle, the head of a rival dojo, forbids them from seeing each other, they decide their feelings for each other are more important than the rivalry between their dojos. Jerry and Eddie compete to see who is the best rapper.

Cuando Jack rechaza la invitación de Kim para el Baile de la Corte del Cisne, ella invita en su lugar a Brody.

When Jack is offered a scholarship to the famous Otai Academy in Japan. Kim struggles to say good bye while Rudy is overjoyed.

Jack is about to break the record of most boards broken by a person under the age of 15, when he slips and loses his memory.

When Milton becomes school president, he becomes the target for an embarrassing takedown.

Jack and Kim are chosen to star in a new action movie. But they discover that they are not just acting in the movie but they are also living it. Their characters are enemies but they are bought together by a kiss.

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Rudy sells the dojo to Ty and the Black Dragons, but he soon regrets his decision when Ty downgrades all of the Wasabi Warriors to white belts.

Frank is blamed for kidnapping the school's beloved pet turtle and is suspended, but Jack believes that Frank is innocent.

Rudy is forced to share his dojo with the Black Dragons.

Rudy explains the origin of the legendary Wasabi Code.