High school history teacher, Monty Paige receives the tragic news that a teen drunk driver has killed his bride of three years while driving home from work. Days later, Monty watches the grave digger prepare his wife's grave in the neatly manicured family plot. The backhoe driver unearths a steel box buried deeply in the newly dug grave. The gravedigger and Monty stake claims to the historic discovery. After a fierce brawl, Monty seizes the box and manages to bring the heavy container home. Inside the box Monty discovers a time capsule containing the secret plot to assassinate the 25th President, William McKinley. The plot reveals details and exposes the name of the masterminds-the untold truth that changes the course of history forever.