In 2128, when the world nears its end, an enforced lottery decides the fate of everyone on Earth. Matthew Jones is evacuated into space. The ship on which he lives is under the control of a group of aliens, called changelings, who possess an unusual ability - They can take people back in time to change things. Matthew and his new best friend Pete befriend the changelings and are soon drawn into exciting adventures which start off as a bit of fun, but end with difficult decisions and unexpected consequences