A demented serial killer taunts a retired police detective with a series of lurid letters and emails, forcing the ex-cop to undertake a private, and potentially felonious, crusade to bring the killer to justice before he can strike again.
Not streaming on a subscription service in the US right now.
Starring Brendan Gleeson, Jharrel Jerome, Holland Taylor, Breeda Wool, Justine Lupe, Harry Treadaway, Maximiliano Hernández, Kelly Lynch, Mary-Louise Parker, Ann Cusack