Warwickshire, 1934
Deep in a hamlet in the Warwickshire countryside, Red Hollow Hall is a male-only sanatorium run by the charismatic psychiatrist Dr Moon. However, all is not well, and Dr Moon's patients are leaving Red Hollow in droves.
Recent disturbances, which originally appeared to be pranks, have descended into something more sinister, and now the men believe they have a malevolent visitor - the mermaid of Red Hollow. The ghost of a murdered girl, they believe the mermaid wreaks bloody revenge on unsuspecting men each time the hamlet floods.
When private enquiry agent, William Garrett, and freshly minted detective, Phyll Hall, are called in to uncover the identity of the intruder, they become trapped in a world of madness, the occult, and grisly murder.
A world where William must use all his strength to differentiate between the real-life monster haunting Red Hollow Hall and the monsters of the mind.
