Christian Wolff (Ben Affleck) is a math savant with more affinity for numbers than people. Behind the cover of a small-town CPA office he works as a freelance accountant for some of the world s most dangerous criminal organizations. With the Treasury Department s Crime Enforcement Division run by Ray King (J.K. Simmons) starting to close in Christian takes on a legitimate client: a state-of-the-art robotics company where an accounting clerk (Anna Kendrick) has discovered a discrepancy involving millions of dollars. But as Christian uncooks the books and gets closer to the truth it is the body count that starts to rise.