Days of Rage is the story of Mick Scott who, after returning home from the Vietnam War in 1968, attends school on the G.I. Bill at Southern Illinois University in Carbondale. There he makes the acquaintance of David Gordon, the director of the controversial Vietnamese Studies Center; controversial because it is rumored to be affiliated with the CIA.
Scott soon concludes it is no rumor when Gordon recruits him to infiltrate the local Students for a Democratic Society (SDS) in an effort to uncover a spy that has infiltrated the Center. As Gordon suspects, it is someone who is affiliated in some way (directly or indirectly) with the SDS.