The Accountant is an action and adventure film featuring Christian Wolff, played by Ben Affleck. He is a brilliant mathematician who struggles to connect with people. By day, he runs a small-town CPA office, but by night, he is a freelance accountant for some of the most dangerous criminal organizations in the world. As the Treasury Department's Crime Enforcement Division, led by Ray King, portrayed by J.K. Simmons, begins to investigate him, Christian decides to take on a legitimate client. This client is a cutting-edge robotics company, where an accounting clerk, played by Anna Kendrick, has uncovered a significant financial discrepancy involving millions of dollars.

As Christian delves into the company's financial records and begins to expose the truth, he finds himself in deeper trouble than expected. With each uncovering of the hidden truths, the stakes grow higher, and the body count begins to rise. This thrilling journey takes viewers through a world of numbers, danger, and moral dilemmas as the brilliant accountant navigates his way through high-stakes situations, revealing secrets that could have deadly consequences.