At twenty-eight, Catherine has just learned about a younger half-sister. Determined to connect with this girl she didn't know existed, Catherine is drawn to a small cottage community in Rhode Island where her search begins. There she finds solace in the sea and in the man who she shares coffee with as they feed the gulls and wonder where these birds sleep at night. This question haunts Catherine as she also wonders where Trini sleeps and if she will ever find the sister she longs to know.