Imagine a bookish man named Francis D., swimming at a public beach in Cape Cod, who drifts out beyond his depth. Imagine that he doesn't drown, that the tide carries him to a private cove where he is rescued by two mysterious young women named Charlotte and Emily. Imagine then that Francis leaves behind his former humdrum life-his formidable wife and teenage daughter-and embarks on a series of violent and erotic adventures, as dream-like as reels...