Set in Washington D.C., The Walker follows Carter Page (Woody Harrelson), a popular socialite who serves as confidante, companion and card partner to the wives of the most powerful men in America. When Carter's dearest friend (Kristin Scott Thomas) finds herself on the brink of a scandal, he covers for her. Suddenly Carter finds himself the chief suspect in a criminal investigation and this well-connected man-about-town becomes an outcast, hounded by the police and forced to hunt down the true culprit in order to clear his name.