Nocturne American Horror Language Film Is Streaming Online Watch on Amazon Prime Video, Release Date 13th October 2020. As part of the “Welcome to the Blumhouse” series of (8) films, Nocturne is a supernatural horror thriller produced by Jason Blum through his production company Blumhouse Productions. The story follows a timid young teenage girl who has a more outgoing twin sister. They both attend an elite art school with the girl focusing on music. She starts to outshine her much more accomplished sister when she discovers the notebook of a recently deceased classmate. Cast: Sydney Sweeney, Madison Iseman, Jacques Colimon and Ivan Shaw. Written by Zu Quirke. Directed by Zu Quirke.