On Christmas Eve, 85-year-old Miriam Caravasios steps onto the ice that surrounds her seaside estate on Maine's Mount Desert Island. As a younger woman, she used to steal out on winter nights to meet her lover, walking across the frozen reach to their secret meeting place. She knows the way --- but not the year. Miriam, her mind clouded by dementia, doesn’t hear the snap of thin ice until it’s too late. Was it an accident? Suicide? Or worse: did someone lure the old woman onto the frozen reach, to her death? There are plenty of suspects; Miriam’s fractured and complicated family has gathered in their Bar Harbor mansion to celebrate what everyone believed would likely be the matriarch’s last Christmas.

On a beautiful October morning in rural Maine, a homicide investigator from the state police pulls into the hard-luck town of Copper Falls. The local junkyard is burning, and the town pariah Lizzie Oullette is dead --- with her husband, Dwayne, nowhere to be found. As scandal ripples through the community, Detective Ian Bird’s inquiries unexpectedly lead him away from small-town Maine to a swank city townhouse several hours south. Adrienne Richards, the blonde and fabulous social media influencer and wife of a disgraced billionaire, had been renting Lizzie’s tiny lake house as a country getaway. As her connection to the case becomes clear, so too does her connection to Lizzie, who narrates their story from beyond the grave.

Nia, a gifted but desperately lonely hacker, is living in isolation with her strict single dad. As a social-media maven, she is wildly popular and has more than a million friends. But they are all strangers. Cameron is on a quest for YouTube fame as a vlogger focusing on exploring the mysteries of Lake Erie. While recording his latest video, he is knocked out by lightning in a freak storm that appears to defy the laws of physics. When Cameron awakens, he discovers an astonishing cyberkinetic talent: the ability to manipulate computers and electronics with his mind. After a chance meeting online, the two teenagers join together to right wrongs in the world --- but they draw the attention of dangerous forces, putting the future of the planet at risk.