A wildlife volunteer on an uninhabited island off the British coast descends into a terrifying madness that challenges her grip on reality and pushes her into a living nightmare.
| Actor | Role |
|---|---|
 Mary WoodvineThe Volunteer | The Volunteer |
 Edward RoweThe Boatman | The Boatman |
| FFlo CroweThe Girl | The Girl |
 John WoodvineThe Preacher | The Preacher |
| JJoe GrayThe Miner | The Miner |
| LLoveday TwomlowThe Baby | The Baby |
 Callum MitchellSound Engineer | Sound Engineer |
 Morgan Val BakerThe Boatman (uncredited) | The Boatman (uncredited) |
| AAmanda RawlingBal Maiden (uncredited) | Bal Maiden (uncredited) |
| DDion StarThe Boatman (uncredited) | The Boatman (uncredited) |
 Isaac WoodvineThe Boatman (uncredited) | The Boatman (uncredited) |