O'Connor, who directed both the new film and its predecessor The Accountant (2016), told PEOPLE at the SXSW premiere that Affleck "understands the character so well" and has done

At SXSW, Ben Affleck joked that he spent 'months and months training' for his line dancing scene in 'The Accountant 2.'

The Accountant 2 follows Wolff, an autistic accountant and a favorite CPA of crime bosses, as he is compelled to solve an old acquaintance’s murder, recruiting his killer-for-hire brother ( Jon Bernthal) to help, and, in the process, uncovers a deadly conspiracy.