Not long after her release back into the general population of Ponyville, Screw Loose vanishes without a trace. During a search of her home one week after she was last seen, a video recording of her apparent final hours is found.
The Rock Farm is isolated from everyone. Marble Pie knows that. That's why no one else has seen the mouth in the snow, following her wherever she goes. Every day it's closer, and today she's alone. And the snowfall has become very deep...
When Apple Bloom goes missing, Applejack desperately searches for her missing sister. She finds Apple Bloom trapped inside a well. But what she pulls out may not be her sister at all.