Adam Salton's journey from Australia to his ancestral estate in England transforms into a sinister exploration of obsession and ancient legends. As he contends with the eccentricities of his newfound neighbors, including the pathological Edgar Caswall and the enigmatic Arabella March, Adam becomes entwined in a web of mesmerism, danger, and a legendary creature known as the White Worm. With the help of Sir Nathaniel de Salis, he must decipher the secrets shrouding Lesser Hill and confront the looming darkness in a battle that will determine the estate's fate.