Last Chance Market

"Help a disabled guy buy a couple weeks of groceries, load them in his car, then leave. Didnt even have to help him unload, only interact with him in the stores parking lot. Seemed like an easy way to make a hundred bucks and even feel like a nice guy doing it, right? Now Im trapped. Theres barricades on the windows and doors and- well, theres something in here with me. The cashier is gone and the only exit I can find is this... archway. I dont know what scares me more Mary, that archway, the freaking wolf I saw wandering around, or whatevers making that chattering sound in the dark above me. ...