After being turned back into a young colt, Sombra is tasked to keep an eye on Mother's new creation in someplace called... Ponyville and manipulate her to become evil.

However, that is easier said than done as it turns out the mission would be quite hard for Sombra to complete.

Would Sombra turn Umbré evil, or would Umbré turn Sombra good?

The romance does not come until much, much, much later

(I was going to use the title Umbré and Sombra's Epic Adventures, but the more I thought of it, the more I didn't like it)