Early in the morning on 16 April 2007, on the Virginia Tech campus in America a 23-year-old student called Seung-Hui Cho killed 32 people before turning his gun on himself. The incident became the biggest mass shooting in peacetime US history. This film marks the one year anniversary. Using extensive access to key witnesses, Massacre at Virginia Tech delves into the mystery of how Cho, a young man with no criminal history, became a mass murderer. This gripping and thoughtful film asks - Who was this deranged young man and what caused him to plan and carry out this tragic event?