A teenage girl with leukemia and a fellow patient embark on a journey to locate her estranged father, who is her only matching donor for a marrow transplant.A teenage girl with leukemia and a fellow patient embark on a journey to locate her estranged father, who is her only matching donor for a marrow transplant.A teenage girl with leukemia and a fellow patient embark on a journey to locate her estranged father, who is her only matching donor for a marrow transplant.