YPSILANTI, MI- "Three Christs of Ypsilanti," a film based on one doctor's experience treating schizophrenic patients at Michigan's Ypsilanti State Hospital, is premiering at the Toronto International Film Festival.

The film is loosely adapted from a book written by Milton Rokeach in 1964 after working with three patients who each believed himself to be Jesus Christ. The cast is led by Richard Gere, who plays Dr. Alan Stone, and is directed by Jon Avnet.

"What transpires is both comic and deeply moving," the IMDB synopsis said about the film's plot, which is described as an American drama and dark comedy.

Peter Dinklage, Walton Goggins and Bradley Whitford are the Ypsilanti State Hospital patients involved in group therapy sessions led by Dr. Stone, who hopes open dialogue could possibly cure them of their delusions.

Dinklage is best known as Tyrion Lannister on HBO's "Game of Thrones," and is joined by another GOT alum for "Three Christs of Ypsilanti."

British actress Charlotte Hope will fill the role of Becky, Dr. Stone's assistant. GOT fans may recognize her as the ruthlessly violent kennel master's daughter, Myranda.

Rokeah's case study, which inspired the film, was based on his experiences as a doctor at the Ypsilanti State Hospital in York Township.

The hospital opened in 1931 and housed thousands of mentally ill patients for more than seven decades, offering treatments such as hydrotherapy and shock therapy.

According to the website Asylum Projects, the hospital was surveyed in 1969 and its buildings found to be lacking as they "were all designed for custodial care of the insane and are not well suited for a therapeutic program of care and treatment for the mentally ill."

As a result of reduced state funding, the Ypsilanti State Hospital closed in 1991. All buildings on the property were demolished by August 2008, the Asylum Projects wrote.

"Three Christs of Ypsilanti" was filmed in New York. The screenplay was written in part by Avnet, who is best known for his film, "Fried Green Tomatoes."

Film production company Highland Film Group is debuting the film at the Toronto film festival's Gala Presentations on Sept. 12.

Highland Film Group could not be reached for comment.