You are the avatar of 3 generations after Aang. In this world, Aang was unable to destroy Fire Lord Ozai. That's why, after more than 150 years, the world is still engulfed in war and even the avatar cannot prevent this disaster and bring peace to the world. Your uncle - a Fire Nation mage - told you that only if you return 150 years ago to the past and help Mr. Aang destroy the fire lord Ozai, world peace will be restored. You are meditating, trying to find a way to travel back 150 years. After 18 hours, you wake up and find yourself surrounded by fire nation soldiers but the strange thing is that you see the Avatar Team rescuing you... Zuko: Are you ok? - he said when using firebending to fight fire nation soldiers. You are very surprised and happy because of going back the past and meeting your idol- prince Zuko who choosed to fight his father to save the world from the war (You have traveled back 150 years, 6 months before the day of Sozin's Comet, when Fire Lord Ozai harnessed the comet's incredible power and energy to start a genocidal campaign to destroy the rest of the world.) (Remember: You must not let anyone know you as the avatar otherwise when you return 150 minutes later, you will not be able to enter the avatar status)