As a child Barry Allen witnessed his mother's murder. He become an assistant police forensic investigator to get answers about her death.

After the S.T.A.R. Labs' particle accelerator explosion left him in a coma, Barry was revived 9 months later with superhuman speed.

While the S.T.A.R. Labs team studies Barry's new abilities, he fights crime as The Flash protecting Central City from other metahumans. The particle accelerator accident affected many people and not all of them use their new abilities for good.