Tim Harper was a 20th century man working 90,000 years in the future. As an Agent in the Algheran Time-Travel Project, he was trying to change history to prevent Algheran's destruction by the Chelmmysian Alliance. But in their zeal, some of Algheran's Agents had made a terrible mistake. Now Harper had to right their wrong.
Kalm was an Algheran traitor, a telepath who worked for the Alliance. In a pirated time-machine, he travelled into the past, combing history for Algheran Agents--to destroy them.
Then, in a little backwater town near the site of a crucial historical battle, Kalm and Harper comae together...and all of their plans came apart!