In Imperial Beach, California, the Yosts—a dysfunctional family of surfers—intersect with two new arrivals to the community: a dim-but-wealthy surfing enthusiast and man spurned by the Yosts years ago.

Examine the lives of eight extraordinary women who define the courage and spirituality it takes to lead a life of the sea. A Big Wave Surfer, a Freediver, a Midwife,…