It has not been long since Barry Allen became The Flash and he has been doing his best to protect Central City. Supergirl has also not been active very long helping out in Metropolis where she can. They have both been working separately but know of each other's existence. However a new evil has emerged it's head, targeting other cities. Will Supergirl and The Flash be able to work together to overcome this threat.
Previous story : The Flash (1) Fastest Man Alive
Linking stories : The Flash (1) Fastest Man Alive
Supergirl (1) Bizaro
