When twelve-year-olds Aaron and Manar use a spell to go back in time to Thebes, Egypt, to find Aaron's missing father, they accidentally end up in Thebes in Ancient Greece instead. Manar, used to being the smart one, is out of her comfort zone in a new country and Australian Greek Aaron discovers more about his ancestors and heritage. Pythia, the oracle of Delphi, tasks them with three impossible missions they must complete before they can get home. They insult Artemis, the Moon Goddess, who separates them and turns Manar into a star. Aaron must forge a dagger from a meteorite but needs to create a meteorite shower first. He needs the dagger to cut a lock of Medusa's hair off, so they know they're not getting home in a hurry, if at all. When Athena sends them to the Gates of Hades to help Hercules with his twelfth labour, they learn more about their combined strengths that prove more powerful than the man they are there to help.