The spaceship 'Zeta', carrying Guest and Ha Nayoung, is being pulled into the gravity of a black hole.

Only one single-seater escape pod remains. Only one of the two can survive.

The moment the lever is pulled, the escape pod begins its automatic navigation toward Earth. However, the person left behind on the Zeta will be completely swallowed by the darkness of the black hole.

Now, a decision must be made: who will sacrifice themselves.