In the South Pacific, 1000 feet beneath the surface, a spaceship rests on the ocean floor - a spaceship at least 300 years old. Has it come from an alien culture? From a different universe? From the future?
Four scientists are rushed to the scene: an astrophysicist, a biologist, a mathematician and a psychologist and together they descend into the depths of the sea to investigate.
The riddle seems unsolvable. Then someone or something begins to transmit messages onto their computer screen: messages that grow increasingly hostile and …