After months of training, former Long Island homicide detective Maggie D’arcy is now officially a Garda. She’s finally settling into life in Ireland, and so is her teenage daughter, Lilly. Maggie may not be a detective yet, but she’s happy with her community policing assignment in Dublin's Portobello neighborhood. When she and her partner find former model and reality TV star Jade Elliot murdered, days after responding to a possible domestic violence disturbance at her apartment, they also discover Jade's toddler daughter missing. Amidst a nationwide manhunt, Maggie and her colleagues must look deep into Jade’s life --- both personal and professional --- to find a ruthless killer.

For the first time in her adult life, former Long Island homicide detective Maggie D’arcy is unemployed. But her summer vacation on a remote West Cork peninsula takes a dangerous turn when human remains wash up below the steep cliffs of Ross Head. When construction worker Lukas Adamik disappeared months ago, everyone assumed he had gone home to Poland. Now that his body has been found, the guards seem to think he threw himself from the cliffs. But as Maggie gets to know the residents of the nearby village and learns about the history of the peninsula and its abandoned Anglo Irish manor house, once home to a famous Irish painter who died under mysterious circumstances, she starts to think there's something else going on. Something deadly.

Long Island homicide detective Maggie D'arcy and her teenage daughter, Lilly, are still recovering from the events of last fall when a strange new case demands Maggie's attention. The body of an unidentified Irish national turns up in a wealthy Long Island beach community. With little to go on but the scars on his back, Maggie once again teams up with Garda detectives in Ireland to find out who the man was and what he was doing on Long Island. As she gets closer to the truth about the murder, what she learns leads her back to her home turf and into range of a dangerous and determined killer who will do anything to keep the victim's story hidden forever.

Twenty-three years ago, Maggie D'arcy's family received a call from the Dublin police. Her cousin, Erin, has been missing for several days. Maggie herself spent weeks in Ireland, trying to track Erin's movements, working beside the police. But it was to no avail. The experience inspired Maggie to become a cop. More than 20 years later, she is a detective and a divorced mother of a teenager. When the Gardaí call to say that Erin's scarf has been found and another young woman has gone missing, Maggie returns to Ireland, awakening all the complicated feelings from the first trip. The despair and frustration of not knowing what happened to Erin. Her attraction to Erin's coworker, who never fully explained their relationship. And her determination to solve the case.