Singapore, 1951. When Josephina is a girl, her parents lock her in a room with the father of the boy to whom she's betrothed. What happens next will determine the lives of generations to come. New Zealand, 1984. Josephina and her family leave Sri Lanka for New Zealand. But their new home is not what they expected, and for the children, Sithara and Suri, a sudden and shocking event changes everything. London, 2018. Arriving on her uncle Suri's doorstep, jetlagged and heartbroken, Annie has no idea what to expect, all she knows is that Suri was cast out of the family before she was born. Moving between cities and generations, Amma follows three women on very different paths, against a backdrop of shifting cultures. As circumstance and misunderstanding force them apart, it will take the most profound love to knit them back together before it's too late.