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 Pokemonone 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 Kyurems 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 it's friends, Cobalion, Terrakion, and Virizion, the Legendary Pokemon known as the Swords of Justice- from Kyurems icy clutches! But Kyurems rampage isn't over, and it's drawing power from Reshiram and Zekrom, changing into Black Kyurem or White Kyurem to make it's attacks even stronger! Why is Kyurem attacking Ash and his friends with such unrelenting fury? How will they be able to overcome this danger? to protect it's friends, to discover true power and genuine courage, and to preserve it's bond with Ash and it's companions, a hidden strength awakens within Keldeo.