Inside the halls of an elite arts academy, a timid music student begins to outshine her more accomplished and outgoing twin sister when she discovers a mysterious notebook belonging to a recently deceased classmate.
Sydney Sweeney
as Juliet Lowe
Madison Iseman
as Vivian Lowe
Jacques Colimon
as Max
Ivan Shaw
as Dr. Henry Cask
John Rothman
as Roger
Rodney To
as Wilkins
JoNell Kennedy
as Gordon
Julie Benz
as Cassie Lowe
Brandon Keener
as David Lowe
Stephon Fuller
as Joshua
A.J. Tannen
as Mike
Ji Eun Hwang
as Moira
