Fearless Felicity Penrose thrives on adventure: she's one of the most experienced female sailors in the world. But one day, in the middle of the 1950s, her boat is found abandoned, drifting off the Cornish coast. Fliss has mysteriously vanished, tragically leaving behind her husband and baby daughter, Emma.

Nearly thirty years later, Emma's world is rocked when she is approached by journalist Mike Bond with an extraordinary revelation: that Fliss was seen in America after she was presumed drowned.

As Emma delves into her mother's past, she begins to unravel a tale of deep, abiding love, loyal friendship, and the heartbreaking consequences of a terrible misunderstanding. And the rest of her family are thrown into turmoil. For Fliss is not the only one with secrets long-concealed, and their discovery now could have perilous repercussions for many...