Set in an alternate history Tulsa, Oklahoma, the series picks up three years after a co-ordinated white supremacist attack on police and their families, an event referred to as the White Night. Following the attack, police wear yellow bandanas to protect their identities, while The Seventh Kavalry, the group behind the attack, don familiar "Rorschach" style masks.

Although the racist movement has been forced into the shadows, detective Anglea Abar (Regina King) and Tulsa police chief Judd Crawford (Don Johnson) work together on a police shooting that may signal a revival of the terrorist group. Meanwhile, an imperious Lord of a Country Estate (Jeremy Irons) receives an anniversary gift.