Separated by a continent from her child, Gina Higgins comes to Kiss River with little more than a desperate plan. Now, saving her daughter depends on whether she can uncover a message buried deep below the ocean's surface.

Kiss River's historic nineteenth–century lighthouse has all but fallen into the sea, taking with it the huge Fresnel lens that once served as its beacon. Gina is desperate to find a way to raise the lens as the glass holds the key to her future, her fortune and her only chance to save the one person who matters to her.

Clay O'Neill lives in the old lightkeeper's house, a home he shares with his sister, Lacey. When Lacey invites her to stay with them, Gina eagerly accepts. As Gina begins her quest to raise the lens, Clay finds himself drawn to her struggle, and to Gina herself. But the answers lie deep below the ocean. And the lighthouse holds secrets that neither Clay nor Gina can anticipate…