In 17th century France a group of nuns described some unsettling visitations at their convent, which developed into a story of possession, political intrigue, and a moment in time that was rife with social tensions.
Research:

Behind the Scenes Minis: Mary, Beulah, Baby Alive
33:26

Beulah Louise Henry
39:37

Mary Mallon & Typhoid Revisited
39:52