When Saba Kapoor, an Indian woman living in Washington, DC receives a mysterious email from a woman in Lahore, named Mariam, she initially dismisses it as spam. But Mariam has mentioned Saba’s father and his two other siblings and written that she was their sister who was left behind at the time of the Partition. This detail begins to nag at Saba.
 

When Saba calls her father, Om Prakash, to seek answers he is livid. Without any further explanation he merely says - that sister of his is dead, and he hangs up the phone. Saba knew only scant details of her family’s past – that they had come to India as refugees in 1947. Om Prakash’s brusque response to her phone call piques her curiosity, so Saba calls her aunt, Gita, for answers.

Gita admits that her twin sister named Sita had indeed been abandoned by the family, but she too refuses to say more. Instead, Gita begs Saba to travel to Lahore to hear Mariam’s story from her own lips. Saba’s husband, Kabir, is dead set against her plan to visit Lahore and they have an argument over this.

Will Saba manage to reach Lahore and meet the long-lost aunt? Will she find out how Sita became Mariam and why the family left for India without her? Will Saba unravel the mystery of her family’s dark past?