From the publisher:

Once, he was the Spirit of America. Who is he now? Clad in star-spangled rags, a mystery man named Sam wanders the streets of an anonymous American city, struggling to remember his true identity and purpose. But he's plagued by inner voices and a parade of icons come to life to carry him on a time-travelling journey into the dark heart of America...and hint at his own violent past. Is he Uncle Sam - or one of U.S.? Nominated for an Eisner Award, this moving tale of a down-and-out icon is filled with the passionate and striking imagery readers have come to expect from Alex Ross, the award-winning artist of "Kingdom Come" and "Marvels".