For Jackie Pierce, everything changed the summer of 1979, when she spent three months of infinite freedom at her bohemian uncle’s sprawling estate on the California coast. As musicians, artists, and free spirits gathered at The Sandcastle for the season in pursuit of inspiration and communal living, Jackie and her cousin Willa fell into a fast friendship, testing their limits along the rocky beach and in the wild woods … until the summer abruptly ended in tragedy, and Willa silently slipped away into the night.