After being struck by lightning, Barry Allen wakes up from his coma to discover he's been given the power of super speed, becoming the next Flash, fighting crime in Central City.
With the exception of Bart Allen, all comic book versions of the Flash appear in the TV show, although not all of them have had speed at first, but they did eventually gain it.
Barry Allen:
My name is Barry Allen and I am the fastest man alive. To the outside world, I am an ordinary forensic scientist, but secretly with the help of my friends in S.T.A.R. Labs, I fight crime and find other meta-humans like me. I hunted down the man who ...
Each week's opening credits during the voiceover words "fight crime and find others like me" changes to show the previous week's metahuman encounter.
English