1954: When her former novice’s dependable letters stop, Nora Breen asks to be released from her vows. Haunted by a line in Frieda’s letter, Nora arrives at Gulls Nest, a charming hotel in Gore-on-Sea in Kent. A seaside town, a place of fresh air and relaxed constraints, is the perfect place for a new start. Nora hides her identity and pries into the lives of her fellow guests. But when a series of bizarre murders rattles the occupants of Gulls Nest it’s time to ask if a dark past can ever really be left behind.

Jessamyn St. Germain is meant to be a star. Not an actor who occasionally books yogurt commercials and certainly not a lowly usher at one of Vancouver’s smallest regional theaters. No, she is bound for greatness, and that’s why the part of Maria in the theater’s upcoming production of The Sound of Music is hers. Or it’s going to be.

Marcy Kendrick is a cop with a body count. A successful detective in LAPD Homicide, she is infamous for one thing: killing three serial killers before they could be brought to trial. Marcy knows her actions were in self-defense, but her coworkers can't help wondering if she is on some kind of vendetta—because Marcy's own mother was brutally murdered by a serial killer. Is this her way of getting payback? Adding to the pressure on Marcy, her ex-husband, Jordan Brasswell, has just been promoted over her, and seems determined to keep her under a microscope.

Widow Mimi lives on idyllic Mackinac Island, where cars are not allowed and a Gibson martini with three onions at the witching hour is compulsory. Her estranged granddaughter, Addie, is getting over the heartbreak of not only being dumped by her fiancé, Brian, but also being cut out of the deal for the brilliantly successful video game Murderscape they invented together (with Addie doing most of the heavy lifting).

In between scouring estate sales for her new interior design business, Cottages by the Sea, Meg Barrett visits the swanky East Hampton home of her old college roommate, Jillian Spenser. But instead of seeing how the other half lives, she learns how the other half dies. Jillian's mother, known as the Queen Mother of the Hamptons, has been murdered. Someone has staged a coup.