The story takes place aboard a drifting spaceship in deep space.
An unknown enemy—one that disguises itself as a human and preys on the crew—has infiltrated the ship.
This enemy is known only as the “Gnosia.”
In a desperate attempt to survive, the crew reaches a grim decision:
Each day, they will vote to put one suspicious person into cold sleep.
If all the Gnosia are successfully frozen, humanity wins.
But if they fail to identify the threat in time,
the Gnosia will continue their deadly hunt.
Amidst this atmosphere of paranoia and doubt, the protagonist, Yuri, finds themself trapped in a time loop—