Silver Heart lived a pretty peaceful life in Stable 41. Besides giving the occasional shot to stubborn fillies and hoofing out cough medicine she didn't do much in Medical. Everything was good, even if it was a little boring.

Woe, for it was not to last…

When a mysterious group of ponies attack Silver Heart's Stable and massacre the inhabitants, Silver Heart is left for dead.
When she awakes alone in the ruins of her home she vows to find the ponies responsible and find out why her home was destroyed.