This past spring, Ben Affleck stepped into one of the most iconic roles in cinematic history by playing Batman in Warner Bros.' Batman v Superman: Dawn of Justice. The actor will also return as the Caped Crusader in this summer's Suicide Squad and next year's Justice League, but in between those projects he will play a mysterious yet deadly numbers man in Warner Bros.' The Accountant, hitting theaters October 16. Today we have the second trailer for this harrowing thriller, that showcases a much different side of Ben Affleck.

The trailer from Warner Bros. UK YouTube showcases Christian Wolff (Affleck), 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. The supporting cast also includes Seth Lee, Jon Bernthal, Alison Wright, John Lithgow, Jeffrey Tambor, Cynthia Addai Robinson and Gregory Alan Williams. This thriller will hit theaters on October 14, where it will face plenty of diverse competition. The Accountant will be going up against the concert film Kevin Hart: What Now, Focus Features' fantasy drama A Monster Calls and Sony's Underworld: Blood Wars. It will also arrive a week after the highly-anticipated adaptation The Girl On the Train on October 7, and Jack Reacher 2, Ouija 2 and Boo! A Madea Halloween on October 21.

RELATED: Ben Affleck's The Accountant Wins Weekend Box Office with $24.7M

Gavin O'Connor (Warrior) directs from a script by Bill Dubuque, who made his feature screenwriting debut with 2014's drama The Judge, starring Robert Downey Jr. and Robert Duvall. Mark Williams produces with Gavin O'Connor, Jamie Patricof, Lynette Howell Taylor and Marty P. Ewing serving as executive producers. We'll have to wait and see if this movie will be as successful as Ben Affleck's Batman v Superman: Dawn of Justice, which has made $330.3 million domestic and $872.6 million worldwide since its release on March 25.

Ben Affleck is also in post-production on his next directorial effort, Live By Night, which is set for release on October 20, 2017. Anna Kendrick most recently starred in Get a Job and Mr. Right, and she can be seen in the summer comedy Mike and Dave Need Wedding Dates, which hit theaters earlier this month. Take a look at the second trailer for The Accountant below, and stay tuned for more footage from this upcoming thriller.