The Treacherous Trio—Tirek, Chrysalis, and Cozy Glow—find themselves in a land that is both similar to Equestria yet vastly different…the Boiling Isles. Stranded in a new world, they must find a way to recover their magic and head back to Equestria; but as they encounter the inhabitants thereof, they may yet discover some intriguing potential they can utilize for themselves.

Meanwhile, Jacob Hopkins is seeking to acquire their magic for his own cause against the isles.