Mysticon Dragon Mage Arkayna is looking forward to a ride on the fanciest train in Gemina with her team members. Adding to the mystique: The train is also carrying a famous diamond-with its own famous curse.
But when a villain from the Mysticons' past tries to steal the diamond, the curse unleashes an ancient evil. Now trapped on a runaway train, the Mysticons have to band together even as forces of darkness become determined to tear them apart.
