It was a night that changed the Second World War. The secret air raid against the hydroelectric dams of Germany's Ruhr River took years to plan, involved an untried bomb and included the best aircrews the RAF Bomber Command could muster--many of them Canadian. The raid marked the first time the Allies successfully took the war inside Nazi Germany. It was a mission that became legendary. On May 16, 1943, nineteen Lancaster bombers filled with 133 airmen took off on a night mission code-named Operation Chastise... Based on personal accounts, flight logs, maps and photographs of the Canadians involved, Dam Busters recounts the dramatic story of these young Commonwealth bomber crews that were tasked with a high-risk mission against an enemy prepared to defend the Fatherland to the death.