1899, Belle poque Paris. Luciennes two daughters are believed dead when her mansion burns to the ground, but she is certain that her girls are still alive and embarks on a journey into the depths of the spiritualist community to find them.

1949, Post-War Qubec. Teenager Linas father has died in the French Resistance, and as she struggles to fit in at school, her mother introduces her to an elderly woman at the asylum where she works, changing Linas life in the darkest way imaginable.

2002, Quebec. A former schoolteacher is accused of brutally stabbing her husband a famous university professor to death. Detective Maxine Grant, who has recently lost her own husband and is parenting a teenager and a new baby single-handedly, takes on the investigation.

Under enormous personal pressure, Maxine makes a series of macabre discoveries that link directly to historical cases involving black magic and murder, secret societies and spiritism and women at breaking point, who will stop at nothing to protect the ones they love