Barry Allen is doing okay. He getting over Iris, really slowly, but surely and his friends are doing all they can to get him ready for when he faces the "Reverse Flash" again. But one day someone turns up at S.T.A.R. Labs quite unexpectedly. Can they even trust this new stranger? Suddenly all those things take a back burner as a new meta-human comes into play. And for some reason he's got the Flash at the top of his list. This one may prove to be too much for superhero in red.