Diane, a married Scottish woman, returns home to Edinburgh to help her father after her mother's death, and finds herself drawn into a forbidden relationship with him. The narrative delves into themes of taboo desire, accidental penetration, and the complexities of familial betrayal, as Diane explores her newfound sexual awakening with her father, leading to intense, raw, and emotionally charged encounters. The story is heavy on dialogue and focuses on the emotional and physical journey of Diane as she navigates her new reality, including themes of breeding, over-the-top moaning, and a deep exploration of her sexual desires.