Ash and friends encounter a Pokémon Ranger named Ben. They find out that the legendary Heatran has been disturbed and is now going on a rampage, and Ben is on a mission to calm it down. Meanwhile, Team Rocket decide to catch Heatran, eager for the legendary Pokémon's power.

Ash and friends return to Sunyshore City and Ash is excited to finally get the chance to battle Volkner to try and win his eighth and final badge. Will Ash be able to defeat Volkner and finally be able to qualify for the Sinnoh League?