Ninja Kamui : Episode 4

After his family was brutally attacked by a gang of masked assailants, Joe Logan is approached by FBI agents Mike and Emma to help investigate the murder of his wife and son.

Higan learns that a string of recent murder victims were all former ninjas who had their covers blown. Higan goes after the boss ninja and swears to take revenge for his dead wife and son by crushing the organization.

Yamaji addresses questions from one of his lieutenants regarding Higan's survival. Meanwhile, Mike joins forces with Higan and Emma to launch their own independent investigation into AUZA.

Mike uses information from Emma to track down Jason, a former AUZA employee. Elsewhere, after having his first attempt to infiltrate AUZA City stopped by Zai, Higan learns of an alternate route from the mysterious benefactor.

Aska rescues Higan from certain doom and her true identity is unveiled. Meanwhile, Mike learns that he is now wanted by his own agency, the FBI.

As Higan and Lil engage in combat, Higan achieves complete synchronization with his Gusoku Gear, known as "Kamui." Afterward, Yamaji finally orders Zai to eliminate Higan.

The CEO of AUZA dreams of taking total control of the country's energy infrastructure using Yamaji's ninja organization. Emma makes it her personal goal to stop them with Higan's help. Meanwhile, Jason and Mike are still on the run.

Emma and Jason combine their efforts to launch a hacking attack on AUZA which results in them obtaining top-secret information. Meanwhile, Mike and Higan fend off a squadron of mercenaries sent by AUZA to stop them.

Higan berduka atas kematian Emma ketika surat yang menantangnya berduel datang dari Zai. Mike dan Jason ingin membocorkan data yang mereka retas dari AUZA ke publik tetapi ternyata mereka tidak bisa melakukannya karena drive memori eksternal Emma dienkripsi.

Higan memenangkan duelnya melawan Zai, tapi berhenti membunuhnya. Joseph mengirimkan tentara bayarannya untuk menyerang tempat persembunyian ninja setelah memutuskan hubungannya dengan Yamaji. Sementara itu, Mike menemukan kunci untuk mendekripsi data yang ditinggalkan Emma.

Dilly mematuhi perintah aslinya dan melindungi Joseph dengan memilih untuk melawan Yamaji. Higan kedatangan tamu kejutan yang memintanya untuk mengakhiri kontradiksi klan ninja. Sementara itu, Mike ditangkap di kantor FBI.

Higan dan Yamaji terlibat dalam pertempuran terakhir. Sementara itu, Mike mencoba melacak Joseph saat dia mencoba melarikan diri dari negara tersebut.