Maggie Gilbert and her children, Jack and Alice, live a pretty normal life. That is, until Maggie starts looking into her family tree. In doing so, she uncovers a dark mystery that endangers her children. She has to solve the mystery in the past, if she is to save her family in the present. Together with a fellow genealogist, Zelah, Maggie unearths more and more details about the drowning of a small girl and the unsolved disappearance of Maggie's ancestor.

The Maze Investigators have reached the final message from the medium Claire Lewis—about a young Scot who traveled to Spain in 1938 and disappeared without a trace, leaving behind only a strange, enigmatic message. Maggie returns to Catalonia, to a story heard on her first trip three years before which now has a significance she didn't understand or appreciate at the time. Further revelations lead back to Glasgow and a long hidden crime. Back in Wales, the final confrontation with the Quinn and McCarthy Miller families is looming. There has to be a winner.

Widowed genealogist Ellie McLellan has spent years healing her ravished heart by carefully constructing a new and quiet life away from the hungry glare of the paparazzi. She now fills her days with genealogical research for various clients, safe in the small town of Percyville, Quebec. Until her bid to save a child's life is caught on camera and ambitious tabloid reporter Diane Cooper recognizes her. Turns out Ellie is not safe at all. With Diane sniffing around for dirt and her "big break" story, Ellie learns a dark family secret with the power to destroy the only family she has left.

When Detective Clayton Tyler is tasked with reviewing the formidable archives of unsolved homicides in his police department’s vaults, he settles on one particular cold case from the 1980s: the Chester Creek Murders. Three young women were brutally murdered - their bodies dumped in Chester Creek, Delaware County - by a serial killer who has confounded a slew of detectives and evaded capture for over 38 years.

The job presented to forensic genealogist, Morton Farrier, ought to have been simple and easy. But the surprise discovery of an additional marriage to his client’s father leads Morton on an enquiry, revolving around a mysterious death in the county asylum. Requiring his various investigative genealogical skills, Morton must work to unravel this complex 80-year-old secret and finally reveal the truth to his client.