The story follows a one-time bullied geek, Bob, who grew up to be a lethal CIA agent, coming home for his high school reunion. Claiming to be on a top-secret case, he enlists the help of former "big man on campus," Calvin, now an accountant who misses his glory days. But before the staid numbers-cruncher realizes what he's getting into, it's too late to get out, as his increasingly unpredictable new friend drags him through a world of shoot-outs, double-crosses and espionage that could get them both killed in more ways than Calvin can count.