After the incident at Camp Everfree and Trinity now resurrected, the Mane 7 made a music video for the contest and won the prize money to save the camp.

But what they did not know that there is another possessed car in town, the sister of Trinity is Christine a 1958 Plymouth Fury possessed by Hell. She was formerly owned by Arnie Cunningham when she killed him by accident and was cubed up at the junkyard and somehow de-cubed herself.
With her in Canterlot, Sunset Shimmer and her friends must teach her how not force people to love her but ask them. But with the demons from hell in a Chevy Bel Air have came to capture her, the Humane 7 and their friends must stand up to the incoming evil willing to rampage on Earth.

This is the sequel story to THE CAR Equestria Girls

Takes place after the special "Dance Magic"

Additional characters added from "sometimes they come back"

Christine belongs to Stephen King, John Carpenter, and Columbia
MLP EG belongs to Hasbro

The following of the story is rated "M" for Mature with strong language and intense violence