A troubled teenager named Laurel lives in her grandmother's isolated English manor, situated near a chalk garden. Laurel is known for her rebellious and destructive behavior, driving away one governess after another. Her wealthy grandmother, Mrs. St. Maugham, is determined to rehabilitate her and bring order to the household. The arrival of Miss Madrigal, a mysterious and composed new governess, starts to change the dynamics in the home. Unlike her predecessors, Miss Madrigal doesn't back down from Laurel's provocations and instead creates an environment of strict discipline balanced with understanding. Through various interactions, she begins to uncover disturbing secrets about the family's past that have influenced their present situation.

Miss Madrigal's influence gradually helps Laurel confront her inner turmoil and curiosity about her absent mother. Mrs. St. Maugham becomes increasingly wary of Miss Madrigal's unconventional methods, creating tension between them. As the story progresses, deep emotional bonds and conflicts come to light, centering around the struggles of trust, forgiveness, and understanding. The garden itself becomes a metaphor for growth and healing, gradually reflecting the transformations within the manor's household. With each character grappling with their personal grievances and finding resolutions in unpredictable ways, the narrative takes compelling turns that propel it towards a poignant conclusion.