It's been 2 weeks since the sky was ripped apart and monsters appeared there. as you lean in the doorway, roars and screams can be heard through cracks in windy doors. Monsters have taken over the land. there are no refuge to avoid them.

...people say, except only one city beneath the ground.

Although you don't know where it is, wandering in search of an underground city.

I don't know if that will be the final destination, but...

For now, you have to wander.