Episode 11 of Ninja Kaumi kicks off with a haunting flashback to a pivotal moment in the past, where Zhai reveals to Mari and Higan that a faction of ninjas harbors treacherous intentions, and he, following the chieftain's command, must eradicate any who dare to rebel. Unbeknownst to Zhai at this juncture, his closest comrades, Higan and Mark, harbor secret plans to defect, yearning for a serene life untainted by the relentless cycle of violence and bloodshed.
Shifting to the present, the intense confrontation between Higan and Zhai reaches its zenith as their Gusuko armor runs dry, leaving them to battle it out in a raw display of strength and skill. The clash seems destined to be their final encounter, with survival hanging in the balance for just one warrior. With nothing left to hold back, Zhai unleashes his formidable secret ninja art, dubbed "Thunderclap," upon Higan. Yet, Higan, renowned for his mastery over his five senses and feared by many, counters with his own devastating secret technique, "Serenity."
During the fiercely competitive skirmish, Zhai's mask shatters, baring a portion of his face marred by burns – a scarred testament to the punishment he endured for letting Higan and Mari escape unharmed in the past. Driven by vengeful resentment, Zhai is hellbent on terminating Higan, accusing him of betraying their bond. In an attempt to reasoning with Zhai, Higan's voice carries a plea for understanding, but Zhai remains unrelenting, his anger fueling his strikes.
As the grueling battle persists, Zhai catches a glimpse of a marking on Higan's back – a symbol that once symbolized the unbreakable friendship shared by Mari, Higan, and Zhai. Amidst the clamor of combat, Higan lands a decisive blow, knocking Zhai unconscious. With a determined glint in his eye, Higan asserts that their grievances can be addressed later, but for now, his mission is focused solely on vanquishing AUZA and its malevolent organization.
Elsewhere, Jason is diligently toiling to decipher the data Emma has procured from the AUZA server. Mike strides in, only to be apprised of Higan's departure to engage in a duel with a contingent of ninja. Mike's warning looms heavy in the air: time is of the essence, as the FBI's shadow grows ever nearer. Jason, however, encounters a brick wall; without the crucial code, the data remains inaccessible. But, in a stroke of genius, he manages to unlock the secrets by lifting Emma's fingerprints from a seemingly innocuous scrap of paper. Meanwhile, Mike embarks on a mission to divert the FBI's attention, buying Jason precious time to finish his task.
Elsewhere, Joseph discovers a chilling truth: Yamazi has been surreptitiously siphoning data from him, with the ambitious goal of establishing his own production line of Gusuko Gear, transforming their organization into an unassailable force. In a fit of rage, Joseph dispatches his assassins to eliminate Yamazi. But, Yamazi, being several steps ahead, thwarts Joseph's plans, escaping with the invaluable data in hand.
Later, a dramatic scene unfolds at the AUZA headquarters. Yamazi, accompanied by a swelling tide of sword-wielding ninja, slices through anyone daring to stand in their way. Amidst the chaos, Dilly, Joseph's loyal secretary, emerges as a savior, shielding Joseph from the relentless onslaught of ninja attacks.
As the episode draws to a close, Zhai's mind drifts back to a haunting memory: Yamazi's sinister request for him to commit the unforgivable—to eliminate Higan, Mari, and their innocent son. The realization dawns upon Zhai with a chilling clarity: if he had refused that fateful order, Mari and her son would still be alive today, their lives untouched by sorrow and loss.
