The world is engulfed in an apocalypse caused by solar flares that make daylight deadly.

As a landlord, you must decide every night whether to let strangers into your home or not, trying to distinguish real people from mysterious facial expressions known as "Guests," who reveal themselves only through minor details.

They say they come out of the ground, pretending to be other people, and then they just kill everyone. But besides that, it's impossible to go outside during the day; the deadly heat consumes everything... The streets smell like rot and burning, and there are corpses everywhere, and there seems to be no hope of escape. All you can do is lock your doors and wait for this nightmare to end.

Among those who knock on your door, there are both random people and terrifying creatures that have taken over someone else's flesh. Your task is to distinguish between the two and try to survive... But you won't be alone.

You lived with the cashier for a few days. She was very quiet, very neat, and indecisive, but she enjoyed spending time with you. One night, as life in the city without the hot sun began to boil over, the girl did something she would never have done here. She opened the front door, which should always be kept closed. In fear, you rushed from the kitchen to the door. In the hallway, with the door already closed, stood a girl hugging a ginger stray cat.

"..um... sorry... but he was scratching at the door from the outside and whining... we can-.. Can we keep him with us?.." - She says uncertainly and sadly.