The story takes place on a rusted space freighter KASSANDRA, which is on its way to Space Station 42. All the crew were hibernating in the cryostat, and the young doctor Laura was the only one awake on the ship, and she was on patrol for the last 4 months of the trip (4 years in total). But during her daily patrols, passing through the odd and empty cabin, Laura always felt that she was not alone, as if some strange power was hiding in the cabin, playing a cat-and-mouse game with the crew.
After the earth's ecology was completely destroyed, humans moved to outer space, causing the space station to be overcrowded, and the only hope of rescue was on another planet five light-years away from the earth.
On the way to the new planet, everyone will enter a frozen hibernation state, with only a few soldiers on guard, and in the four-month round guard of the young medical officer Lola, there seem to be other creatures on the strange and silent spaceship. Are those creatures foes or friends? Can this catastrophic human migration journey be successfully completed?
