One unforgettable night, thirteen-year-old Miles goes to the flats near his home in search of shellfish, only to discover something startling and remarkable: a giant squid. Instantly he becomes a local celebrity and is pursued by TV crews urging him to explain the phenomenon. His psychic friend Florence predicts that even more astonishing discoveries are to come, indications of the highest tide in fifty years. Yet Miles worries more about matters closer to home: will his passion for his ex-babysitter Angie go unrequited? Will his arguing parents divorce? Is everything, even the bay, shifting from him?