Washington, DC, 2019: Laura Preston is a reclusive artist at odds with her older sister, Bea, as their elegant, formidable mother slowly slides into dementia. When a stranger contacts Laura claiming to be her brother who disappeared 40 years earlier when the family lived in Bangkok, Laura ignores Bea’s warnings of a scam and flies to Thailand to see if it can be true. But meeting him in person leads to more questions than answers. Bangkok, 1972: Genevieve and Robert Preston raise their three children with the help of a cadre of servants. Robert works for American intelligence, Genevieve finds herself drawn into a passionate affair with her husband’s boss, and their serene household is vulnerable to unseen dangers in a rapidly changing world and a country they don’t really understand.

It seems like just another night shift for Lucy, an overworked ER physician, until six-year-old Ben is brought in as the sole survivor from a horrifying crime scene. Lucy, who’s grappling with a personal upheaval of her own, feels a profound, unexpected connection to the little boy. She wants to help him…but will recovering his memory heal him, or damage him further? Across town, Clare will soon be turning 100 years old. She has long believed that the lifetime of secrets she’s been keeping don’t matter to anyone anymore, but a surprising encounter makes her realize that the time has come to tell her story. As Ben, Lucy and Clare struggle to confront the events that shattered their lives, something stronger than fate is working to bring them together.