From the bestselling author of The Vanishing Tide comes a deeply moving and haunting novel that asks: do the secrets we keep always rise to the surface?Every morning is the same for Eliza: she swims in Hampstead Ponds, diving into her memories, reliving the heady days of her teenage friendship with Eric and Maggie.The obsession, the adoration, and the sense of belonging she always craved was perfect, until everything was destroyed in a single afternoon.With guilt never far from the surface, she still asks herself: what really happened that day?Then one morning, on a street corner, the past collides with the present.Eliza is now a respected member of the community and the carefully constructed life she has built comes crashing down.Should she track down the one person who may be able to forgive her? Or should she keep the past where it belongs?Soon Eliza begins to wonder: will learning the truth set her free – or will it only drag her down deeper?