Ally isn't able to live with her mother. Instead she lives far, far away, on the other side of the country, with her gram and great-aunt. But one summer Ally goes to stay with her aunt and uncle in the "big city by the ocean" and gets to spend time with her mom. While exploring the shore, watching whales from the boat dipping into the salty water, Ally finds out something important: her mother loves to swim as much as she does.