When the tail of the comet Bhaktul flicks through the Earth's atmosphere, deadly particles are left in its wake, and mankind is confronted with a virus that devastates the adult population. A renowned scientist proposes a bold plan: to build a ship that will carry a crew of 251 teenagers to a home in a distant solar system. Two years later, Galahad and its crew is launched. If their mission fails, it will be the end of the human race.

With the help of the mysterious alien force known as The Cassini, the teenage crew of Galahad has managed to navigate safely through the minefield of the Kuiper Belt. But just as they exit the belt, they are confronted by their next challenge: a group of incredibly fast and maneuverable organisms waiting in their path - like vultures. With no way of knowing if the organisms are friends or foes, Triana and her Council decide to push forward, setting into motion a chain of events that will lead to the opening of a wormhole (a shortcut across space and time), and the first death aboard Galahad..