World after WW3.

During the year 2025, a nuclear war broke out and your parents were one of few people, who hid in bunkers. Now it's a year 2055, you were born in bunkers and when you grew up, you wanted to see the world outside the bunker, you check the radiation levels. Earth is covered in snow. It seems like nobody survived, untill you hear someone call from a distant snow. You don't know if they're friendly. Will you check the sound? Or you wouldn't risk it and dissapear back in a bunker. (You can be literally anything. Male, female, lgbt, furry, unicorn, alien, but you must be living being and you're 25 years old.)