 Tim (Will in the North American version, Paul in the European version) is just an ordinary boy with uncanny psychic powers. He did not know a use for them, until he stumbled into "Dark Space" and met Gaia, a goddess that resembles a disembodied head of an old woman with dread-locks. She tells Tim that he is needed to stop the "Comet of Doomsday" from hitting the Earth, mutating every living thing on Earth as well. Plus, Tim also needs to search for his father, whom was lost on an advanced expedition. Tim meets new friends and with the help of Gaia, learns new special powers (such as transformation), so he can be worthy of destroying the "Comet of Doomsday". However, what is causing the comet to appear?