Flash Sentry used to work for the royal guard. He used to care about his life. He used to care about keeping a healthy diet. He used to care about socializing with ponies.

Then he met Lyra Heartstrings: a pony who became closer to him within a few short days than anypony else had within years. Sparks fly for the young stallion, but there's just one problem. She's interested in mares.