Off the coast of Maine, on an island shaped like a seagull in flight, shrouded by mists off the bay, lives a novelist Jason Lorraine and his teenage daughter Lisa. They live a simple life, largely cut off from the mainland, and Lisa's weak health poses a frequent concern.

After the sudden and untimely death of Lisa's mother, Jason becomes even more reclusive and protective. Lisa is forbidden to see Jamie, the charming fisherman's son who has quickly become her closest confidante in her grief. The star-crossed lovers steal time with one another, but fate intervenes, and they may never find a happy ending. A brooding artist from out of town, Kyle, arrives and brings more color to Lisa's world. As Lisa fights for love, independence, and agency, will her beloved island become her sanctuary or her prison?