Zhen, whose mother had gone to live abroad since she was a child, had been in foster care at her uncle's family. In the summer, a baby was born in her uncle's family. Zhen, who was in foster care, went through her mother's letters that she used to write. During the summer, Zhen decides to go back to her mother's countryside through these letters to find out her mother's past life. On a hot southern afternoon, Zhen meets up with her mother's former nanny. Two lonely souls, abandoned, redeem each other in the scent of frangipani flowers.