Dr. Noah Key would gladly have traded places with his wife in the car accident that claimed her life. Without her he finds himself living a half life, haunted by all the ways he failed in his marriage. Determined to absolve himself, Noah sets out on a journey to the other side of the world to provide medical aid after a devastating storm destroys an impoverished island. But nothing is as he expected; faced with impossibly difficult choices, Noah must decide if he's helping or hurting the people around him. Dr. Elizabeth Lowe has honed her skills by traveling to the most war torn and environmentally devastated regions of the world. Easily misjudged as cold and indifferent, Elizabeth seems like the last thing Noah needs in his life. But she may be the only person capable of convincing him to stop trying to pay a debt he doesn't owe. Will he stop punishing himself long enough to realize he can let her in?