Cinder was about as ordinary as a dragon surrounded by ponies could get. She's just looking for a job to get some spending money, using her strength to her advantage. Steel Thunder was a train conductor, up until several bottles of booze and a train coupler cost her her job, and a limb. Now completely broke, she turns to the most dangerous steel mill in all of Equestria: Stallion Ironworks. Famous for its dangerous machinery, even more famous for its incredibly demanding foremen.