Lucy has been writing her dissertation about Sappho for thirteen years when she and Jamie break up. After she hits rock bottom in Phoenix, her Los Angeles-based sister insists Lucy housesit for the summer-her only tasks caring for her beloved diabetic dog and trying to learn to care for herself. Annika's home is a gorgeous glass cube atop Venice Beach, but Lucy can find no peace from her misery and anxiety - not in her love addiction grou ptherapy meetings, not in frequent Tinder meetups, not in Dominic the foxhound's easy affection, not in ruminating on the ancient Greeks. Yet everything changes when Lucy becomes entranced by an eerily attractive swimmer one night while sitting alone on the beach rocks.