Chief Inspector Armand Gamache of the Sûreté du Québec is called to investigate the death of a villager at an Easter séance that was held at the Old Hadley House.

1873. At an abandoned ch́teau on the outskirts of Paris, a dark šance is about to take place, led by acclaimed spiritualist Vaudeline D'Allaire. Known worldwide for her talent in conjuring the spirits of murder victims to ascertain the identities of the people who killed them, she is highly sought after by widows and investigators alike. Lenna Wickes has come to Paris to find answers about her sister's death, but to do so, she must embrace the unknown...