What should have been the happiest day of Walker's life quickly turned to one marked by tragedy as his darling Alex was targeted and shot by Storm -- a man she put away five years earlier on a hijacking rap. As Alex clings to life in the hospital with C.D. at her side, Walker takes to the streets of Dallas on a mission like no other -- to find the man who did this and make him pay at any cost. (Taken from CBS Homepage)