Julieta is a middle-aged woman living in Madrid, planning a move to Portugal with her partner Lorenzo. However, her plans are disrupted when she accidentally meets Beatriz, an old friend of her estranged daughter Antía. This encounter reignites memories and unresolved feelings, prompting Julieta to cancel her move and confront her past. She returns to the apartment she once shared with Antía, engulfed in a flood of recollections that reveal the roots of their strained relationship. Through a series of flashbacks, we learn about Julieta's younger years, from meeting Antía’s father Xoan to the emotional and tumultuous experiences that followed.

As Julieta writes in her journal to connect with the daughter she lost touch with, fragments of their story gradually piece together. She recounts their life after Xoan's tragic death and the significant impact it had on their bond. Julieta's reflections guide viewers through moments of joy, sorrow, and guilt that shaped her journey. These introspections are punctuated by her ongoing quest for resolution and understanding. Her narrative is an exploration of motherhood, grief, and the complexities of human relationships, illustrating how the past perpetually influences the present and future.