1937. In a village on the Dorset coast, fourteen-year-old Mitzy Hatcher has endured a wild and lonely upbringing - until the arrival of renowned artist Charles Aubrey, his exotic mistress and their daughters, changes everything. Over the next three summers, Mitzy sees a future she had never thought possible, and a powerful love is kindled in her.

A love that grows from innocence to obsession; from childish infatuation to something far more complex. Years later, a young man in an art gallery looks at a hastily-drawn portrait and wonders at the intensity of it. The questions he asks lead him to a Dorset village and to the truth about those fevered summers in the 1930s ...