バートンとベレッカは、大江戸の忍市で開催される世界忍者サミットに向かう元柳斎に同行。到着後、彼らは忍者博物館を訪れ、妖怪と戦った古代の忍者、妖怪を封印した神社、500年前に雷に打たれた大杉について学ぶ。2人が実際の大杉と神社を見に行くと、突然風が吹き荒れ、さらに大杉に雷が落ちて…
Burton and Berecca accompany Genryusai as he heads to the World Ninja Summit taking place at the Shinobi City in Oedo. Upon their arrival, they visit a ninja museum where they learn about the ancient ninjas who battled yokai, as well as the shrine that sealed away the yokai and the grand cedar tree that was struck by lightning 500 years ago. When the pair go to see the actual grand cedar tree and shrine, a sudden wind begins to rage. To make matters worse, lightning strikes the grand cedar tree…