The film, based on the experiences of retired FBI agent Michael German, will star Daniel Radcliffe as an FBI agent who goes undercover to infiltrate a white supremacist group and expose a terrorist plot to create a dirty bomb.
Collette will play Angela Zampino, "a battle-hardened FBI agent." Letts, the Tony- and Pulitzer-winning author of August: Osage County, will play Dallas Wolf, a "modern-day leader of the white supremacy movement." Trammell will play Jerry Conrad, an "overtly average father in suburbia who, in actuality, is the local Aryan Youth recruiter." The script for the film was co-written by Ragussis and German, based on German's experiences as an undercover agent who spent years inside U.S.-based neo-Nazi and militia groups.