In the year 2236 a brilliant new supernova lights the night sky.

Forty-eight years later a meteor strikes an orbiting CosTek space station... a secret team develops a new hybrid android... and the company's astronomical observers sight a baffling tetrahedron-shaped object approaching Uranus. Synchronicity? Or are more intentional, even sinister, forces at work?

Astonishingly, CosTek astronomers trace the origin of the mysterious object Tetra to Situla, the source of the supernova -- and infer that the entity is occupied. But by what -- or whom? An android crew is dispatched to investigate, led by Dr. Benjamin Akers, a top android designer and , by a radical twist of fate, now the world's first hybrid biological android himself. His prophetic adventure leads him inexorably to a Rendezvous with Tetra.