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.