It is not unusual for thirteen-year-old Miles O'Malley to sneak out and explore the tidal flats of Puget Sound by moonlight.

When he discovers a rare sea creature one night, he becomes a local phenomenon hounded by people curious to know whether he is an observant boy or an unlikely prophet.

But Miles is just a kid on the verge of growing up, infatuated with the girl next door, worried that his bickering parents will divorce, and struggling to keep his world intact.

In this captivating novel, we witness dramatic changes for both Miles and the coastline he adores over one unforgettable summer.