The true culprit and main antagonist of the film, Hiruko, is a missing-nin and former friend of the Sannin (Orochimaru, Jiraiya, and Tsunade) who disappeared from Konohagakure dozens of years earlier, after developing Chimera Technique, a jutsu which allows him to absorb both the chakra and Kekkei Genkai of other ninja. Based in Mount Shami with followers, Ichi, Ni, and San, Hiruko uses a genjutsu to project himself in the skies above Konoha, announcing that he will obtain the Kekkei Genkai of the Land of Fire and become immortal and invincible, then instigate the Fourth Great Shinobi World War and conquer the world. With Hiruko wanting the last of the Kekkei Genkai, he eventually becomes interested with Kakashi, due to the fact he has the Sharingan. Hiruko plans to get the Sharingan no matter what, even going as far as to controlling him to do his bidding. With Hiruko intending to use the power of the solar eclipse to carry out this plan, a race to defeat him begins as the moment of the eclipse draws near.

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