The Greek Demi-god, Back must climb Mount Everest without any oxygen at all because at the top he needs to collect a magical stick that would trap his evil cousin Muddley in the stick. Without him having oxygen will stop his terrible asthma. Once he gets the stick, he will be able to breathe under any condition. His fate is that his kind twin sister will die from him in the process.
Around a quarter of the way, Back gets distracted and chucks rocks down the mountain. The god Daphne yelled at him until he payed attention and then gave him a guitar to play with when he got down the mountain. Since Back is a Demi-god, he was able to fit the guitar in his pocket.
At the point of Everest where the snow begins, he becomes extremely cold and is saved by Ankhiale, the god of heat. Ankhiale gives him a magic anti-cold potion.
Back sees the stick and grabs it and then some witches get in his way. He just makes them fall down the mountain because it turned out that the guitar would move anything away. Once he holds the stick, his cousin immediately got stuck in the stick forever.
Back gets home and is rewarded by Daphne giving him a $40,000 Martin guitar.
I'm so sorry!
Back's kind, mortal sister came to back to congratulate him, but when she did, Back was super happy and throwing his arms up in excitement. He accidentally hits her causing her to die.