Some people donate to charity, some people may even donate blood, but who donates a kidney to a total stranger? The Chain follows the story of an everyday woman as she saves the life of person she has never even met. Her gift does not only save one life, but starts a chain of kidney transplants and saves several lives. This is the ultimate and most beautiful story of Paying It Forwards. What makes a healthy person want to offer part of their body to make a stranger well? himself.