Terror begins after Twilight and her friends make a horrifying discovery during a trip to the castle of the two sisters. Now trapped within the ruined castle, they swiftly learn the darkness is the last thing to fear.
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...
Megan Williams has been living for 20 years without any sign of Equestria from her childhood, until several children go missing. Meanwhile, she finds a terrifying secret in the basement of her barn...a barn which never had a basement before...
Follow Twilight as she and a trio of other survivors try to reach Manehatten amidst the arrival of a new and blood thirsty foe...will they have what it takes to make tough decisions in a world that is slowly falling apart around them?