During an all-night, drug-fueled party at an abandoned asylum known for the horrific treatment of its patients, a group of ordinary teens decide to experiment with the occult, mysteriously leading to a violent possession. In an effort to find help, the group rushes to escape, only to find themselves locked inside with no means of communication. Tempers flare, trusts are broken and in attempt to save one of their friends possessed by the demon, the amateurs try to perform an exorcism. Instead of solving the problem, and unbeknownst to them, they unleash an even more powerful and vengeful spirit, one with a distinct motive and which wants them all dead. The teen's only chance of survival is to uncover the asylum's deep mysteries and find a way out before it's too late.
Unfortunately the movie Exeter is not yet available on HBO Max.
| Writing | Kirsten Elms | Writer |
| Directing | Marcus Nispel | Director |
| Production | Kellie Roy | Casting |
| Sound | Jeremy Grody | Sound Re-Recording Mixer |
| Production | Brandt Andersen | Producer |
| Production | Michael Corso | Producer |
| Editing | Blake Maniquis | Editor |
| Costume & Make-Up | Carla Antonino | Makeup Department Head |
| Production | Anne Mulhall | Casting |
| Visual Effects | Rocco Passionino | Visual Effects Supervisor |
| Production | Anne McCarthy | Casting |
| Crew | Christopher Dooly | Makeup Effects |
| Camera | Eric Tramp | Camera Operator |
| Production | Trent Othick | Producer |
| Sound | Eric Allaman | Music |
| Camera | Eric Treml | Director of Photography |
| Costume & Make-Up | Deborah Newhall | Costume Design |
| Art | Jared Hartley | Art Direction |
| Art | Sarah Hill Richmond | Set Decoration |
| Sound | Keith Bilderbeck | Sound Designer |
| Crew | John Ruggieri | Special Effects Coordinator |
| Lighting | Branden James Maxham | Gaffer |
| Directing | Carol A. Compton | Script Supervisor |
| Sound | Kevin Nanaumi | First Assistant Sound Editor |
| Costume & Make-Up | Hillary Derby | Costume Supervisor |
| Camera | Christopher TJ McGuire | Steadicam Operator |
| Camera | Lisa Tanner | Still Photographer |
| Production | Marcus Nispel | Producer |
| Crew | Ben Bornstein | Makeup Effects |
| Art | Guy Roland | Production Design |
| Visual Effects | Jeffrey Edward Baksinski | Visual Effects Supervisor |
| Crew | Paul Marini | Stunt Coordinator |
| Sound | David Bawiec | Music Editor |
| Production | Michael E. Phillips | Executive Producer |
| Art | Zach Salinger-Simonson | Set Dresser |
| Costume & Make-Up | Cheryl Daniels | Hair Department Head |
| Art | Leila Mrakovcich | Set Dresser |
| Art | Joseph Kelsey | Assistant Property Master |
| Costume & Make-Up | Jennifer Traub | Key Makeup Artist |
| Costume & Make-Up | Alyson MacInnis | Key Costumer |
| Editing | Eric R. Brodeur | Additional Editor |
| Lighting | Harry Pray IV | Lighting Technician |
| Camera | Deb Peterson | Second Assistant Camera |
| Camera | Will Emery | First Assistant Camera |
| Visual Effects | Ashish Dani | Matte Painter |
| Crew | Chuck Rudolph | Generator Operator |
| Editing | Ken Blackwell | Additional Editor |
| Editing | Bradley Greer | Digital Intermediate Colorist |
| Visual Effects | Joseph Payo | Visual Effects Coordinator |
| Lighting | Steve Sikora | Lighting Technician |
| Visual Effects | Graeme Baitz | Digital Compositor |
| Production | Christopher Conkling | Production Accountant |
| Camera | Mark Brochu | Best Boy Grip |
| Crew | Colin Feist | Compositor |
| Lighting | David Christopher | Lighting Technician |
| Visual Effects | Emily Kister | Visual Effects Coordinator |
| Visual Effects | Brian Hanable | Digital Compositor |
| Crew | James Johnson | Special Effects Technician |
| Production | Rebecca DiFillippo | Production Coordinator |
| Camera | Jon Stenning | Camera Production Assistant |
| Visual Effects | Ryan Purnell | Digital Compositor |
| Crew | Peter Rippe | Special Effects Technician |
| Lighting | Robert Clark | Best Boy Electric |
| Camera | Darryl Byrne | First Assistant Camera |
| Camera | Andy Mellen | Second Assistant Camera |
| Editing | Jeremy Brunson | Assistant Editor |
| Sound | Peter Stevenson | Boom Operator |
| Camera | Paul Bulgin | Key Grip |
| Directing | Gregory J. Smith | First Assistant Director |
| Crew | Herve Desroches | Special Effects Technician |
| Art | R. Vincent Smith | Property Master |
