When I was young I thought the family I had found would be with me forever, even if we were different. Not everypony sees the difference in others as a good thing though.

On their way home from another failed attempt to earn their cutie marks, the Crusaders crash into an unknown young pony whom has no cutie mark either! Something about this pony seems a little different though. Will the CMC add a 5th member, or will the difference make the difference?