When Dr. Leo Liebenstein's wife disappears, she leaves behind a single, confounding clue: a woman who looks, talks, and behaves almost exactly like her and even audaciously claims to be her. While everyone else is fooled by this imposter, Leo knows better. Certain that his real wife is alive and in hiding, Leo embarks on a quixotic journey to reclaim his lost love. From the streets of New York to the southernmost reaches of Patagonia, Leo's quest becomes a test of how far he is willing to take his struggle against the seemingly uncontestable truth he knows in his heart to be false.