Unrest plagues the streets of New Delhi leading up to the birth of the Muslim majority nation of Pakistan, and the Hindu majority nation of India. Sixteen-year-old Deepa navigates the changing politics of her home, finding solace in messages of intricate origami from her secret boyfriend Amir. Soon Amir flees with his family to Pakistan and a tragedy forces Deepa to leave the subcontinent forever. The story also begins nearly seven decades later and half a world away, in Atlanta. While grieving both a pregnancy loss and the implosion of her marriage, Deepa's granddaughter Shan begins the search for her estranged grandmother, a prickly woman who had no interest in knowing her. When she begins to piece together her family history shattered by the Partition, Shan discovers how little she actually knows about her ancestors and what they endured.