When the southern plum rains arrive, Lin Wei returns to the old family home she hasn't visited in years to sort through her grandmother's belongings. In the damp air, the moss-covered wooden door seems to echo with faint knocking on rainy nights. The sound overlaps with a crucial memory she lost in childhood. As she searches the house for the old things her grandmother left behind, including a yellowed diary and a few blurry photographs, the truth behind the knocking gradually comes into focus: it wasn't a mysterious sound, but the everyday memory of her grandmother coming home through the rain, knocking and calling for her to bring in the laundry. Later, her grandmother fell ill and her memory faded, and Lin Wei buried that scene away. Before the rainy season ends, this recovered memory helps Lin Wei make peace with the regrets of the past and understand her grandmother's quiet love anew.
