When Joey Rubin stumbles upon a group of elderly women swimming in a lake one freezing January morning, she thinks they must be mad. But then they dare her to come in... Joey, an overworked New York architect, is in the Cotswolds to oversee the restoration of Stanway House - the stately home that inspired J.M. Barrie to write Peter Pan. It hasn't been easy. The local residents aren't exactly welcoming, and then there's the problem of the brooding caretaker, a man who seems to take every opportunity to undermine her plans. She soon begins to feel that she can't do anything right. Until, that is, she discovers the J.M. Barrie Ladies' Swimming Society and begins to take a daily dip with them in their own private Neverland. For Joey, meeting Aggie, Gala, Lilia and co. is a life-changing experience, the beginning of a friendship that will transform her in the most remarkable of ways...