'The Ritual Killer' follows Detective Boyd (Cole Hauser), who, unable to process the death of his daughter, embarks on the hunt for a serial killer who murders according to a brutal tribal ritual: Muti. The only person who can help Boyd is Professor Mackles (Morgan Freeman), an expert in African Studies. As Boyd goes deeper into the killer's world the line between sanity and madness thins Ritual Killer' follows Detective Boyd (Cole Hauser), who, unable to process the death of his daughter, embarks on the hunt for a serial killer who murders according to a brutal tribal ritual: Muti. The only person who can help Boyd is Professor Mackles (Morgan Freeman), an expert in African Studies. As Boyd goes deeper into the killer's world the line between sanity and madness thins.