When the Scarlet Speedster of Central City runs into a vicious, dark speedster from another Earth, things quickly turn upside down for him, and everyone he ever cared about. There have been many metahumans he's had to take care of, like Weather Wizard and Turtle and Grodd, as well as many others, but Barry Allen never thought he would run into another threat with the same ability he has. Barry had to take care of the Reverse-Flash, who was faster than him and killed his mother, putting his father in jail, but now he was in so much more danger than he ever was with Reverse-Flash. So is everyone he loves. Patty, Iris, Joe, everyone at S.T.A.R. Laboratories, even the vigilante of Star City. But nothing can stop this darkness from rising... Or so they think. Now, Barry has to race to save everyone he loves and cares about. Along the way, he might even find true love.