is forever bonded with that of the Avatar Spirit of Light and Peace. As the Avatar, Aang must master all four elements to bring peace to the world and restore the order between the Four Nations. Aiding him is the fourteen-year-old Katara, the sole remaining waterbender of the Southern Water Tribe, and her older brother Sokka, a fifteen-year-old warrior of the Southern Water Tribe. Haru is a young teenage Earthbender who helps the gang in their mission to save a missing friend. Many characters from the show appear on this; King Bumi, who appears in the fourth level. Story While training at the Northern Water Tribe, Avatar Aang and Katara hear reports of a waterbender, Hiryu, going missing, which they investigate. They arrive at the Water Tribe as a Fire Nation ship attacks, led by Prince Zuko. They are able to fend off the attackers, but Katara is captured during the battle. Aang and Sokka follow the ship, but are slowed by a firebending machine. They follow the ship to an Earth Kingdom port. They slip into the jail and release Katara, who informs them of another prisoner named Lian the Maker, who is being forced to make machines for the Fire Nation. When they arrive at Lian's cell, they find it empty, except for a map to an Earth Kingdom village. They find the village under attack by machines. After fending off the machines, picking up Haru and being informed that one of his earthbending friends Yuan was kidnapped, they travel to the library of Omashu for clues to where the machines might originate from. The information from the library leads them to an uncharted island. On the island, they find Lian, making more machines. She fears that Avatar Aang will not be able to master all four elements before Sozin's comet arrives. Aang refused her help, seeing as how the machines were disrupting villages. Lian then voiced her contempt for him as she sends a machine to fight them to flee to the Air temple, attempting to destroy the Avatar statues. They stop Lian, but Katara, Sokka, and Haru are all captured by another machine. Aang pursues Lian and the machine to a fortress. After Aang rescues his friends, they find Prince Zuko, also captured by a machine. Upon rescuing him, Prince Zuko attacks the group. At the end of the resulting fight, the Fire Nation prince is