In winter, everything is frozen solid. Blades of grass are like alarm systems as the slightest footfall creates a crunching noise when someone moves. A short investigation into the source of a sound in the backyard gets more excruciating each step you take away from the warmth and safety of your house. It’s even scarier if you keep hearing the sound of footsteps and no one appears to be there. On cold winter nights, you can see your own breath in the air, but when you can’t see the breath of a stranger, it’s even more terrifying.