From Wikipedia:

"Inspired by a true story, eccentric computer genius Walter O'Brien and his team of brilliant-minded outcasts cannot function normally in society. One day they are recruited by federal agent Cabe Gallo of the U.S. Department of Homeland Security when a serious problem arises. Even though O'Brien and Gallo have history, he and his friends agree to help solve the problem and ultimately become the last line of defense against complex, high-tech threats around the globe."

http://en.wikipedia.org/wiki/Scorpion_(TV_series)