When his friend, Mary (Palmer), asks him to substitute for a team member in a Double Dutch tournament, Izzy discovers his new love for the sport.

Isadore "Izzy" Daniels (Corbin Bleu) is a star boxer in Brooklyn, hoping to win the Golden Gloves, like his father and coach Kenneth (David Reivers).

Izzy competes in an exhibition match against Rodney (Patrick Johnson Jr.), his classmate and the neighborhood bully, and wins using strategy and focus.

Izzy's neighbor, Mary Thomas (Keke Palmer), is a competitive Double Dutch player on a team called the Joy Jumpers; though the two often argue with each other, their friends know that they have mutual crushes.

Izzy brings his younger sister, Karin (Kylee Russell), and her friends to the Double Dutch regional competition, to watch Mary and her teammates, Shauna (Shanica Knowles), Keisha (Laivan Greene), and Yolanda (Jajube Mandiela).

Upset with Mary's freestyle choreography, Yolanda leaves and joins their main competitors, the Dutch Dragons.

The girls convince Izzy to be a temporary replacement until they can find someone else, and he secretly practices with the Joy Jumpers before school at his father's gym.

Over several days, Izzy spends more time with the Joy Jumpers and improves tremendously at Double Dutch, though his boxing skills and punctuality suffer.

Izzy takes out his anger at the gym until Tammy reminds him that she's been teased by him and others constantly, but she's overcome it to become the best girl boxer in Brooklyn.

He uses the tricks he honed in freestyle practice to dodge Rodney's attacks and push him against the ropes repeatedly, finally stating that they both had a lot to be mad about, but fighting about it would not settle their issues.

The Dutch Dragons show up, with Yolanda and their leader, Gina (Paula Brancati), making snarky comments toward Mary and her teammates.

Tammy shows up with Izzy's friends, Chuck and Earl (Mazin Elsadig and Micah Williams), to support the Hot Chili Steppers.

The Hot Chili Steppers take the stage, with Izzy showing the skills he's learned, impressing his friends and family.

Before the winner is revealed, the screen suddenly freezes and cuts to a group of kids at the boxing gym, who are listening to Izzy's story narrated by Rodney.

The film was originally set to star Raven-Symoné and be named Double Dutch, but due to Symoné's busy schedule at the time, it was later revamped into Jump In!

In the movie, Izzy Daniels renames the Double Dutch team, dubbing them the Hot Chili Steppers.

was originally written by Sherwyn Smith, who now works as a teacher at an elite private school in Brooklyn Heights, New York.

broke the record previously set by The Cheetah Girls 2 as the highest rated DCOM premiere with 8.2 million viewers.

As of July 8, 2008 the album has sold over 600.000+ copies within the U.S. Frank Fitzpatrick composed the original score for the film and wrote and produced two songs for the soundtrack, including the single "Jump to the Rhythm", a co-production with Nashville’s Keith Thomas featuring Jordan Pruitt.