Is this a good storyline for a novel?

Okay, so I'm trying to write a novel about Greek mythology. A boy named Jason and his friend Zack are taken to a special school for demigods by their gym and history teachers. It is later revealed that their gym teacher is actually a satyr and their history teacher is Pholus. There are twelve floors in the school, one for each Olympian where their children live. It is then revealed that Zack is a son of Hephaestus and Jason is a son of Zeus. They meet Mikaela, a daughter of Athena and Luke, a son of Hercules. A prophecy made by the Oracle of Delphi (Pythia) states that Jason and his friends must go on a quest to save Artemis from the clutches of an unknown villain before the next Olympian meeting. At the end of the novel the villain revealed to be behind this is Gaea, who is attempting to be ressurected in order to overthrow the gods, and Jason's friend Draco (help with a new name for him too) is revealed to be a spy for her. Draco battles Jason, Draco injures Jason and leaves him for dead. Draco then flees the school. Chiron and Mikaela find Jason who tells them what happened and they now must try to figure out a way to stop Draco from resurrecting Gaea.