Naruto Shippuden

Naruto Shippuden, Sasuke's Story: Sunrise, Part 4: The Ketsuryugan (22x29)

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Sasuke uncovers Fuushin’s true identity at last, and begins to fight him. The moment Sasuke tries to read Fuushin’s memories with his Sharingan, a wave of genjutsu from a massive red eye causes Sasuke to lose consciousness. He awakens to find himself alone, and sees tracks in the snow that indicate Fuushin has barely escaped alive.