In the long shadow of an experimental CIA mind control program, Sergeant Kellen O'Reilly begins experiencing violent flashbacks of his “treatments” at the hands of the sinister Dr. Satorius. When the body count on his latest case inexplicably begins pointing toward his own fragmented past, a romance with Satorius’ criminal prosecutor raises the stakes. O'Reilly must forge a path forward through a hall-of-mirrors conspiracy stretching from the Mafia to the highest levels of the CIA, culminating in a shocking, stadium-sized confrontation.

Adapted from author Bán Mór’s bestselling novels, the 10-episode series tells the story of the Hungarian warrior Janos Hunyadi, who defeated the Ottoman army in 1456 at the Battle of Belgrade, halting its march across Europe.