Life in Marblehead has had a pleasant predictability, until Diesel arrives. Rumor has it that a collection of priceless ancient relics representing the Seven Deadly Sins have made their way to Boston's North Shore. Partnered with pastry chef Lizzie Tucker, Diesel bullies and charms his way through historic Salem to track them down, and his criminal mastermind cousin Gerewulf Grimorie. The black-haired, black-hearted Wulf is on the hunt for the relic...

When twenty-three-year-old Sister Evangeline accidentally stumbles upon some mysterious letters exchanged between the late mother superior of her convent and the famous philanthropist Abigail Rockefeller, she is thrust into an ancient conflict between the Society of Angelologists and the monstrously beautiful descendants of angels and humans, the Nephilim.

The world is preparing to come to an end according to the Divine Plan recorded in the Nice and Accurate Prophecies of Agnes Nutter, Witch (recorded 1655). Meanwhile, a fussy angel and a fast-living demon have grown fond of living among the earth's mortals for many millennia and are not looking forward to the apocalypse. If Crowley and Aziraphale are going to stop it from happening, they must find and kill the Antichrist.