Southern California, 1960s: endless sunny days surfing in Malibu, followed by glittering neon nights at Whisky A-Go-Go. In an era when women are expected to be housewives, Carol Donnelly is breaking the mold as a legendary female surfer struggling to compete in a male-dominated sport, and her daughters, Mindy and Ginger, bear the weight of her unconventional lifestyle. The Donnelly sisters grow up enduring their mother's absence, physically, when she's at the beach, and emotionally, the rare times she's at home. To escape questions about Carol's whereabouts, and chase their mom's elusive affection, they cut school to spend their days in the surf. From her first time on a board, Mindy shows a natural talent, but Ginger, two years younger, feels out of place in the water. As they grow up and their lives diverge, Mindy and Ginger's relationship ebbs and flows. Mindy finds herself swept up in celebrity, complete with beachside love affairs, parties at the Playboy Club, and USO tours to Vietnam. Meanwhile, Ginger, desperate for a community of her own, is tugged into the vibrant counterculture of drugs and cults. Through it all, their sense of duty to each other survives, as the girls are forever connected by the emotional damage they carry from their unorthodox childhood.