Rainbow Dash was perfectly happy with her life as a pirate. She had a FTL-capable battle cruiser, a mostly loyal crew that didn't try to kill her in the last three months and a hole bunch of money, but than she had to steal this strange alien artifact.
Now she is stuck together with her former friend and present enemy Applejack while the hole world is trying to kill them.

Crossover-tag because parts of the setting are inspired by the game Freelancer.

A long time ago the pegasus Trusty Harp died. No one remembers her anymore and everypony in Equestria has forgiven the one responsible for her death his sins. Everypony except for one.
After spending thousands of years wandering all over the world in search for knowledge and power he finally returns to seek vengeance only to realize that his sworn enemy has changed. Questioning the purpose of his journey - of his live - it is up to the Mane Six to show him that he still can find happiness in his live.