11岁时,艾伦(格兰特·古斯汀 Grant Gustin 饰)的母亲离奇死亡,而他的父亲则被当成了凶手。之后,警探乔(杰西·马丁 Jesse L. Martin 饰)收留了孤苦伶仃的艾伦,在乔的耳濡目染之下,成年后的艾伦成为了一名CSI鉴证分析员,在此过程中,他一直没有放弃过对于母亲真正死因的调查。 艾伦十分迷恋科学家哈里森(汤姆·加瓦那 Tom Cavanagh 饰)所研究的粒子加速器,然而,一场意外让加速器发生了爆炸,艾伦被击中陷入了昏迷。九个月后,终于苏醒的艾伦惊讶的发现自己体内产生了神奇的变化,因此而获得了特殊能力。随着时间的推移,艾伦开始明白,这个世界上,还有很多和自己一样拥有超能力的人存在,而保护市民的安全成为了他新的责任和任务。Barry Allen is a Central City police forensic scientist with a reasonably happy life, despite the childhood trauma of a mysterious red and yellow lightning killing his mother and framing his father. All that changes when a massive particle accelerator accident leads to Barry being struck by lightning in his lab. Coming out of coma nine months later, Barry and his new friends at S.T.A.R labs find that he now has the ability to move at superhuman speed. Furthermore, Barry learns that he is but one of many affected by that event, most of whom are using their powers for evil. Determined to make a difference, Barry dedicates his life to fighting such threats, as The Flash. While he gains allies he never expected, there are also secret forces determined to aid and manipulate him for their own agenda.