(Crossover with a Universal horror film loosely based off a story by Edgar Allen Poe.)
The girls are enjoying a break from school. Along the way, they meet Dr. Vitus Werdegast, a psychiatrist traveling to see an old friend, Hjalmar Poelzig. When their bus crashes and Sunset Shimmer is injured, they find themselves subject to the dubious hospitality of Poelzig, and discover that Werdegast seeks not friendship, but vengeance against Poelzig. Poelzig is revealed to be the leader of a satanic cult, and plans to sacrifice the girls in a ritual.