Some ponies only know about Vinyl and Octavia through their reputation as the owners of the fairly large downtown club "The Hop!". Others though know what they really do. They take care of ponies who become troublesome to Vinyl's aunt Sunset Shimmer as well as sell a bit more than alcohol to the ponies in their club. They don't mind though. Octavia likes the bits and Vinyl loves helping out family (and loves the power she gets from violence even more).
After a few years things have become routine for them. Until one contract from Sunset starts a chain reaction that threatens to destroy the lives of every pony involved with the operation.