Two little girls, holding hands and singing in the back seat of a car. There for each other, unafraid. Life for the Stone girls is a life lived on the edge. Singing for a living, Marley and Andi find their way through a childhood of upheaval marked by their mother Donna's dark, unpredictable flights. Today, Marley writes the songs her twin, country diva Andi Stone, makes famous, and the girls' connection struggles to survive the cuts and devastations...