A month after the D-Day Invasion, when the Allies believed all was safe off the beaches of Normandy, the Minesweeper YMS-304 was blasted out of the water-with 100% casualties. The initial detonation tore apart the minesweeper, taking her down in only 63seconds-the fastest sinking of WWII. What happened was a secret hidden for more than 60 years. Deep Sea Detective John Chatterton travels to Normandy to dive the remains of this tragic wreck with the help of French diver Bertrand Sciboz.