After he endures an arduous screening process, a young college student secures a summer internship with the Department of Homeland Security. As he gains invaluable experience, Brock Cahill has no idea that a chance encounter with a gunman on the street one day will change everything. After he singlehandedly takes down the gunman with an evil mission, Brock goes about his normal life-until he receives a mysterious job offer from the government. When he reports to a remote installation to begin training, Brock quickly realizes all is not as it seems. Hidden deep beneath the installation is a secret facility tasked with a vital mission. Soon after Brock learns he has been recruited into a mysterious program known only as Dark Horse, he is quickly thrust into a brutal selection process for an elite team of operatives that leaves him struggling to recover from a ruthless attack while proving his worth. Looming in the distance is a veiled mission that, if discovered, could permanently alter the balance of power in Washington and threaten the security of all Americans. In this political thriller, a young intern is recruited into a covert government intelligence program where he must complete several dangerous missions that include infiltrating a domestic terrorist group.