3 Ninjas Knuckle Up

As the sun-kissed days of summer unfold, three unlikely heroes - 14-year-old Rocky, 13-year-old Colt, and pint-sized Tum Tum - find themselves embroiled in a battle for justice. While staying with Grandpa Mori, they bear witness to the tumultuous protests of Native Americans facing off against the toxic waste industry, their cries for help falling on deaf ears. As chaos erupts and authorities intervene, the boys are forced to flee, but not before they catch a glimpse of Jo, a feisty young activist, being brutalized by J.J.'s goons at the local pizza parlor.

The next day, Colt, Tum-Tum, and Rocky stumble upon J.J. and his cohorts harassing Jo once more, this time at the same pizza joint. Without hesitation, they leap into action, employing their impressive martial arts skills to take down the would-be bullies. The crowd cheers as the trio emerges victorious, but their victory is short-lived. Mori, the wise and witty grandfather, sees through their bravado and tasks them with making amends by working off damages at the pizza parlor.

However, Jo's arrival changes everything. She reveals that J.J.'s men are mere pawns in a larger game orchestrated by Jack Harding, a ruthless industrialist hell-bent on dumping toxic waste into the Native American reserve. The boys learn that Charlie, Jo's father and a determined investigator, has gone missing while looking into Harding's illegal activities. Colt, smitten with Jo, agrees to help her find her father, and together they hatch a plan to infiltrate Jack's operation.

With Mori's guidance, the boys sneak into Jack's facility and eavesdrop on his conversation with the Mayor, exposing the extent of their corruption. They discover Charlie imprisoned and decide to mount a daring rescue mission. With Mori's help, they succeed in freeing Charlie, and the trio spends the night celebrating with the tribe, basking in the gratitude of those whose lives they've improved.

As the sun sets on their triumphant evening, Jack and his cohorts launch one final assault on the celebration. Undaunted, the boys join forces with the Native Americans to fend off the attackers, Mori's wise counsel proving invaluable as they fight for justice, truth, and the American way.

As Charlie's family and he meticulously prepare their case against Jack, they gather an arsenal of incriminating evidence aimed at finally putting the nefarious entrepreneur out of business for good. Meanwhile, Jack orchestrates a sinister plot to kidnap Jo, using his connections with the bikers to manipulate her father into falsifying crucial evidence - a move that leaves him no choice but to compromise his integrity in order to ensure his daughter's safety.

In response, Rocky and his brothers set out to track down Jo's whereabouts, racing against time to rescue her before Charlie's hard-won case is dismissed and all their efforts are rendered futile. After navigating a treacherous route through an abandoned town beset by armed bikers, they finally locate Jo and make the daring rescue, returning her safely to the courthouse just as her father is about to turn over the real evidence to Jack.

As the boys arrive at the courtroom, they find themselves embroiled in a tense standoff with Jack's goons and the sheriff. Just as things seem poised to spiral out of control, Jo bursts into the room, mere seconds before her father is about to hand over the damning evidence to the EPA representative. In a flash of defiance, Charlie delivers a crushing blow to Jack, followed by a poignant admission of his mistake and the surrender of the genuine proof - effectively shutting down the company responsible for the toxic waste.

As the dust settles, Rocky, Colt, and Tum-Tum slip away unnoticed, leaving Jo and her family to search in vain for their saviors. Back at Mori's humble abode, the trio ponders the wisdom imparted by their elder: that true heroism lies not in seeking recognition, but in quietly blooming like a flower, unassuming yet radiant. With this lesson etched into their minds, Grandpa Mori and the boys perform an exuberant somersault of triumph.