An area cloud of unfamiliar composition is on the collision program with Earth as the world holds its breath.

The anomaly sails through the solar system and the International Space Place along with three astronauts and one cosmonaut are thrown back to the Cretaceous period where dinosaurs roam Earth hunting prey and great pterosaurs patrol the skies.

Supplies on the place work low and desperation calls for keep, but morale grows when the crew sees a bright multi-colored light blinking on the surface below. The astronauts opt to evacuate the train station in the Soyuz escape capsule and check out. As the adventurers struggle to survive in the primordial jungle, the party discovers artifacts of a historical civilization that could help them find the light beacon. If they can stay alive long enough.