3 Ninjas

Samuel, Jeffrey, and Michael start their annual summer stay with Mori Tanaka, who teaches them ninjutsu. Mori christens Samuel as Rocky, Jeffrey as Colt, and Michael as Tum-Tum, shaping their identities for the adventures to come. The summer becomes a focused training ground that deepens their bond and skills.

Sam Douglas stages a sting operation to trap the master criminal Hugo Snyder in the sale of warheads. Snyder evades capture with his ninja henchmen and escapes by helicopter. He later returns to visit Mori, testing Mori's defenses with his forces.

Snyder visits Mori and challenges him, but Mori's ninjas attack and are defeated by Mori with the help of his grandsons Rocky, Colt, and Tum-Tum. The clash underscores the old partnership turned adversarial. The encounter confirms the danger Snyder poses to the family.

Face to face, Snyder refuses to train his men and threatens Mori's family if Sam continues pursuing him. Mori remains calm but makes clear the protection of the boys remains a priority. The confrontation heightens the tension between the two families.

The boys return to their home and find their father, Sam, unenthusiastic about their training and more annoyed by their new ninja names. The dynamic contrasts Sam's FBI life with Mori's mentorship, though the boys' confidence continues to grow. The return marks a uneasy reset to normal life.

Emily compliments Rocky's new ninja name and agrees to ride with them to school the next day. The moment blends everyday teenage life with the brothers' enhanced identities. It hints at normalcy returning alongside the looming danger.

Snyder devises a plan to kidnap the brothers to use as leverage against Sam so he can complete his missile sale. Snyder's consigliere Nigel Brown enlists Fester, Hammer, and Marcus, expanding the threat to the entire family. The scheme relies on exploiting the brothers' ninja skills for criminal gain.

Fester and friends shadow the brothers after school, attempting to stage an abduction. Their plan is interrupted by a fender-bender with a police car, delaying their pursuit. The close call reveals the FBI's ongoing watch and the risk to the kids.

Emily is separated from the group and confronts bullies who steal her bike. In recess, the brothers challenge the bullies to a two-on-two basketball game and score ten straight points to win back Emily's bike. The victory strengthens the brothers' teamwork and resolve.

Mori conducts reconnaissance and tracks Snyder and his associates to a harbor ship at Berth 6. The pursuit foreshadows the upcoming confrontation on Snyder's vessel. Mori's quiet vigilance keeps the brothers safe while they remain unaware of the danger aboard.

Fester and his crew break into the Douglas home using a fake pizza order to subdue the babysitter. They take Emily hostage during the confusion, prompting the brothers to act with greater urgency. The incident demonstrates how close the danger has come to the kids.

After a later confrontation, the brothers are overpowered by Snyder's bodyguard Rushmore and taken captive aboard Snyder's ship. Mori fights his way through to attempt a rescue, setting the stage for the final showdown. The journey to the ship marks a turning point in the summer's danger.

Snyder challenges Mori to a fight for the brothers' freedom in the ship's dojo. Using his youth and speed, Snyder gains the upper hand and appears poised to strike the final blow, aided by a pepper bomb. Mori counters by gagging Snyder with Tum-Tum's jelly beans and defeats him.

Sam arrives with backup and shoots Snyder in the shoulder, arresting Snyder, Nigel Brown, and their henchmen. He reassures the boys that they can continue visiting Mori every summer and takes the night off to celebrate with pizza and family. The immediate danger subsides as the criminals are taken into custody.

Sam takes the night off from work to celebrate with his sons and Mori, ordering pizza for everyone. Mori, who hates pizza, joins the celebration with a begrudging smile as the summer ends on a hopeful note. The three generations reaffirm their bond and the summer tradition continues.