Forming a Legion of Zoom--including Captain Cold, the Turtle, Gorilla Grodd, and the Trickster--the Reverse-Flash sets out to not only beat Barry Allen, but also assume his life! Can the Fastest Man Alive keep up with the attacks around Central City when everyone and everything he loves is in danger? With his greatest enemy calling on Barry''s children from the future, the Tornado Twins, the Flash Family steps up to help the hero as he faces his biggest battle ever.