Naruto: Shippūden (2007)

S20E487 Sasuke's Story, Sunrise, Part 4: The Ketsuryūgan

Sasuke finally discovers Fuushin's real identity and engages him in battle. Just as he attempts to delve into Fuushin’s memories using his Sharingan, a powerful genjutsu from a colossal red eye overwhelms him, plunging him into unconsciousness. When he regains his senses, he finds himself alone in the snow, noticing footprints that suggest Fuushin has narrowly evaded capture.