In 1956 France, a priest is violently murdered, and Sister Irene begins to investigate. She once again comes face-to-face with a powerful evil.

Passengers on an immigrant ship traveling to the new continent get caught in a mysterious riddle when they find a second vessel adrift on the open sea.

When a young nun at a cloistered abbey in Romania takes her own life, a priest with a haunted past and a novitiate on the threshold of her final vows…