A portrait of pain shared by an entire nation. After 40 years, the blood stains are still not forgotten.

In 13 seconds, the Ohio National Guard fired 63 shots that killed four students and wounded nine.

The definitive story of events leading up to May 4, 1970, is told here for the first time. The haunting photograph of Mary Vecchio poised in anguish over the body of a slain student; the fervor of the wounded student activist still consumed with the need for justice 30 years late. Some choose to forget, others fight to keep their hard-earned lessons alive for the new generation. Try as they may, the entire cast of survivors cannot escape the questions and accusations that fly around as each anniversary comes and goes.