Christy McLane and her child prodigy sister, Molly, are alone in the world. Alone, until they arrive on the island of Chincoteague, Virginia. Like the famous ponies that roam the area, Christy and Molly flee to the island to take refuge after a tragedy leaves them marooned and unanchored. To stay afloat, Christy will need to make unforeseen sacrifices as she navigates the waters of life.

Against the beautiful backdrop of the Virginia shoreline, caring islanders and shy, aerospace scientist, Jared Stevenson, help Christy find the faith and tranquility she seeks. However, just when everything seems perfect, Jared's hidden past disrupts their peaceful existence, plunging the entire island into a sea of lies and danger that will change their lives forever.