Mary begins the second act of the great ritual, at the same time as Alden returns to Salem. Meanwhile, Dr. Wainwright searches for clues to cure the plague, using worrying methods.
Mary receives much needed assistance from a former foe to keep Salem under the management of the witches.
A prominent family meets their new neighbours in the only Departure-free town in America - Jarden, Texas, renamed "Miracle" after it was discovered no one departed - and experience a mysterious event that will forever change their lives.