Ash and Pikachu along with their friends Iris and Cilan are on a train headed to the next stop on their journey. From the train Ash spots an injured Pokemon one he's never seen before. He's trying to figure out how he can help when the train is attacked by the Legendary Kyurem a Dragon-type Pokemon with immense power! Ash and the others barely manage to escape the rampaging Kyurem's attack and as the dust settles they turn their attention to the injured Pokemon.

Ash and Pikachu, along with their friends Iris and Cilan, are on a train headed to the next stop on their journey. From the train, Ash spots an injured Pokemon--one he's never seen before. He's trying to figure out how he can help when the train is attacked by the Legendary Kyurem, a Dragon-type Pokemon with immense power! Ash and the others barely manage to escape the rampaging Kyurem's attack, and as the dust settles, they turn their attention to the injured Pokemon. Their new acquaintance turns out to be the Mythical Pokemon Keldeo and it's on a mission to rescue its friends--Cobalion, Terrakion and Virizon, the Legendary Pokemon known as the Swords of Justice--from Kyurem's icy clutches!