Hannah has done everything right: marriage, a baby, a high-level job. Her sister Holly is the college dropout, an aspiring songwriter working at a coffee shop. Then one day perfect Hannah leaves her baby with Holly and disappears. Holly knows nothing about babies, but she takes little Mason to the empty family homestead where she meets Wyatt Clark, a handsome cowboy who is mysteriously good with babies. And then, just as Holly can no longer imagine life without either Mason or Wyatt, Hannah returns for her son.