Fresh out of university, the young Mycroft Holmes is already making a name for himself in government. Yet this most British of civil servants has strong ties to Trinidad, the birthplace of his best friend, Cyrus Douglas, and where his fiancee Georgiana Sutton was raised. Mycroft's comfortable existence is overturned when Douglas receives troubling reports from home, rumors of spirits enticing children to their deaths. Upon hearing the news, Georgiana abruptly departs for the island. Mycroft convinces Douglas that they should follow her, drawing the two men into a web of dark secrets that grows more treacherous with each step they take.