Long ago a group of humans were tricked into making a deal with the Devils on the plan of Chaos, by one of their own wizards during a pivotal point in their war. The Devils held up their end of the bargain by driving their enemies back, but from that point onward each generation was to give up their first-born child to the Devils. Unknowingly helping to create was is now know as Tieflings.
Tieflings are the spawn of Devils and Humans, mostly seen as evil because of their heritage. They are not very common in the world, but they are known by most of all of the citizens as their features tend to make them stand out. Humanoid creatures of skins ranging from a light red to a dark maroon color, hair going from stark black to a deep crimson. Eyes of gold, blue, red, or purple. The feature that stands out most though are their horns, all different between each Tiefling, but a major part of their heritage.
In a world where people will avoid Tieflings because of their Devil heritage, some Tieflings embrace the chaos that is within them and makes society think worse of them. While some fight to show the world that those of strong will can overcome the Chaos and try to make the world a better place. It is a long road for those that wish to change the worlds view of their race, but they believe it is a road worth fighting for.