He's a unicorn accountant in service to a smuggling ring. She's a high-ranking Thestral in the Day Guard. Together, they fight crime. Too bad one of them's lying.
After freakish happenstance turns Lyra Heartstrings and Queen Chrysalis into a symbiotic being, they find themselves putting their superpowers to heroic use in an ever-changing Equestria.
Twilight is teleported to Blood Gulch Canyon after meddling with a ship that crash landed in Equestria. She must enlist the help of the local red and blue soldiers to get home while unraveling a dark conspiracy linking her world to a shadowy agency.