Being a cripple and misfit in a prehistoric society of an earth-like planet, Kyle discovers one day a crashed space shuttle in the forest. Harriet, a crew-member of the crashed shuttle, tells Kyle reluctantly the truth about their origin; which is, that they are all descendants from Earth, a planet that was destroyed by earth's sun already a millennium ago. He also learns that before Earth's sun went nova, the people on Earth built and sent out nine seedships to various planets that were inhabitable by mankind, carrying their precious cargo of frozen human embryos. Androids - called the Enforcers - were created by the mothership that had landed on Terra 9; and Kyle manages to convince the enforcer Iris - who is also the ship's captain - to take him aboard. However, before long Kyle learns that the Nightwing is a ship with an ominous secret. But there is no turning back anymore for Kyle; his fate being inextricably linked with that of the Nightwing's crew, and the head-on clash between two species...