Christian Wolff, a mathematical genius with a preference for numbers over people, leads an unassuming life covertly operating as a freelance accountant for some of the world's most dangerous criminal organizations. With his high-functioning autism, Christian has a unique set of skills that make him a standout in his field. As the Treasury Department's Crime Enforcement Division, led by Director Ray King, starts closing in on his activities, Christian takes on a legitimate client, a state-of-the-art robotics company where an accounting clerk has discovered a discrepancy involving millions of dollars. Tasked with unraveling the books and uncovering the truth, he starts working alongside the clerk who detected the financial irregularities.

Meanwhile, the Treasury's investigation intensifies, and Christian's past comes back to haunt him, revealing a complicated upbringing involving harsh military training administered by his father after his mother abandoned them. As Christian gets closer to the financial truth within the robotics company, bodies begin to pile up, and he must employ his other considerable skills to protect himself and those around him. Relationships evolve and unexpected connections emerge, causing a series of revelations that begin to unravel the mystery shrouding Christian's shadowy clientele and his own troubled history.