3 Ninjas: High Noon at Mega Mountain

Rocky, Colt, and Tum-Tum begin their summer adventure with their grandfather, Mori. Fueled by enthusiasm, they set out to conquer a challenging obstacle course, despite the obstacles that await them in the darkness.

Mori overhears Rocky and Colt discussing their plans to abandon their summer adventures when the season ends. This conversation deeply saddens him as he reflects on Tum-Tum being left alone without his brothers.

Back at home, Tum-Tum struggles with the thought of his favorite show being canceled. He feels despondent, unable to find joy in his favorite activities, including his beloved sandwich.

An unexpected accident occurs when Amanda crashes her remote-controlled helicopter into Tum-Tum's window. In a gesture of kindness, Tum-Tum's mother invites Amanda for breakfast and shares the upcoming birthday plans at Mega Mountain amusement park.

Once at Mega Mountain, Rocky chooses to connect with his girlfriend Jennifer while Tum-Tum drags Colt to a show. Their excitement is short-lived as trouble looms over the amusement park.

The cunning Mary Ann "Medusa" Rogers infiltrates the amusement park, putting everyone in danger. She demands a huge ransom and begins disabling rides, causing chaos among park guests.

Tum-Tum and Colt try to get an autograph from their idol, Dave, but to their dismay, they witness his capture by Medusa's henchmen. This event marks a pivotal moment, galvanizing their resolve to save him.

Rocky successfully uses surveillance cameras to track down his brothers and Amanda. They resolve to take action, informing Dave of Medusa's threats, and prepare to fight against the peril facing them.

As chaos unfolds, the boys and Amanda engage with Medusa's henchmen using the tech-savvy skills Amanda possesses. This courageous act showcases their quick thinking despite the looming danger.

Rocky faces off against Medusa's dim-witted nephews while simultaneously planning a daring rescue for Jennifer. His ninja training kicks in as he cleverly navigates carnival games to outsmart them.

An explosive battle ensues as Dave liberates trapped guests and Rocky engages in combat with Lothar atop the roller coaster. They use their skills and teamwork to thwart Medusa's plans once and for all.

Rocky manages to seize an opportunity to throw Lothar out of the park just as Medusa's plan to escape reaches its climax. The perilous situation builds to a thrilling climax that captures the audience's attention.

After a series of confrontations, Medusa finds herself trapped as authorities surround her. Amanda's clever use of a remote-controlled helicopter leads to even more embarrassment for the villainess.

The boys race against time to disarm a bomb planted by Medusa to destroy the park. Utilizing Dave's expertise, they ingeniously redirect the bomb to Medusa's escape vessel, resulting in a spectacular explosion.

The adventure concludes with the boys hailed as heroes, celebrating their bravery while looking forward to new escapades. The joyous birthday party for Tum-Tum signifies the promise of more adventures to come.