Gilbert Power, an American podcaster, travels to Bodkin, an Irish coastal town, to investigate a cold case involving the disappearance of three people during a Samhain celebration several decades prior. He is joined by Dublin-born Dubheasa "Dove" Maloney - an investigative journalist in London who is sent on assignment after the passing of her source, a government whistle-blower - and Emmy Sizergh, an aspiring journalist.