Thunderlane is just a fresh recruit within the Wonderbolts and currently living his dream of it. However, during his time of rest, he comes across something that pretty much turns his life upside down and gives this normally flirtatious stallion a run for his bits. Turns out, Rainbow Dash has a cousin and she's decided on a surprise visit.
With this new mare catching his attention, Thunderlane will do his best to try and impress her, hoping to gradually gain more and more of her attention and favor. He was determined to sweep this lovely filly off her hooves no matter what.

Unknown to Thunderlane, nor anyone else though, the new mare known as Blizzard Rush, is hiding something; something that would cause everypony's life to drastically change as she is not at all what she appears to be. Will Thunderlane and Rainbow Dash be able to get under her wing though, and slowly change her plans?...Or will the worst come to fruition and a new war between the Sisters - and those that follow them - and a new empire of darkness that could rival even the Crystal Empire of King Sombra occur?

Only time will tell...

(I rated the story as teen cause further in, it will get a bit dark and have slight gore in it, but not too much. Still, better safe than sorry. Also, don't need permission ta use the pic cause, oh hey! I'm the artist of it, pfft.)