A Digimon appears, attacking both humans and Digimon left and right with an eerie sword in hand.
On the very night that Angoramon learns about it, he runs into the Digimon by pure coincidence. But the truth was that the Digimon wasn't the culprit; whoever holds the sword gets changed into a tsujigiri. When Angoramon touches the sword, he is driven by the urge to slay someone.
Not wanting to hurt anyone, especially Ruli, Angoramon resists the urge until it finally overcomes him. Thankfully, Hiro and the others find him just before he is about to cut down Ruli. Gammamon evolves to Kausgammamon to fly her out of harms way.
Teslajellymon and Kausgammamon attempt to take the blade from Angoramon, but he is able to absorb some of both of their data. With that, Musyamon appears with the cursed blade. The two were fused together when they came thru the gate of the Digital World.
Angoramon evolves to Symbaangoramon. Kiyoshiro sends everyone to the Digital World when fighting is eminent. Angoramon gets help from Zubamon, and the two defeat Musyamon. The humans within the sword are released.
Musyamon is taken back to the Digital World, and Hiro is handed a letter from his father. Hiro had asked what to do with Digimon who are too hard to handle? To everyone's frustration his father replied, "Sorry, son! I don't know! Good Luck!"
"Tomorrow comes tomorrow's breeze," says Symbaangoramon.
NOTE: Tsujigiri is the practice of when a samurai gets a new weapon or technique and would test it out, often on a random passerby. Thanks to With The Will Digimon Forums for translation.