imagine running from a horde of zombies after you were caught off guard and sprinting through a forest, hopeless and desperate because you can't seem to shake off this horde that seems to be growing in numbers, until finally you come across a shelter carefully concealed in the pinewood, almost blending into the surrounding landscape.
the man living there must have seen you running in the distance because when you pass by, the door opens and shuts like a spider's trap, and he drags you inside and holds you to his chest so you don't so much as twitch until you hear the horde pass by. and it's large. hundreds of undead groaning and rushing by, almost clambering over one another, still thinking that they're in pursuit of you. your heart is smashing against your ribcage because you realize now that there's no way you could've outrun them or gotten away - the man at your back is the only thing standing between you and certain death.
he introduces himself as Gaz and tells you that you can spend however long you'd like with him. he's been living in the woods since the outbreak and he's been stockpiling food and water since long before. one of his old army buddies bought the bunker almost a decade back - a real prepper-type, though he passed well before the apocalypse and left the property to Gaz in the absence of any family.
you're so appreciative of his help and you aren't one to look a gift horse in the mouth, so obviously you take him up on his offer and spend the week.
only when days go by and you mention that you're thinking of heading out now that the horde has long passed, he talks you out of it. seems concerned about what'll happen to you if you're on your own out there. you let him convince you to stay a little longer, but sure enough, after another few days you start to get jittery, anxious to get back out on the road because the last thing you want to do is overstay your welcome.
then you see the locks on the door. it's padlocked shut, the key nowhere to be found. you don't remember there being locks on the inside. that's the only thing you can think when Gaz comes up from behind you, planting both of his hands on your shoulders, almost as if to offer you reassurance.
"don't worry, love," he murmurs, bending low so his voice is right in your ear. "i'm gonna keep you safe. you won't ever have one of them chase you again."