War Gamers

When WWII breaks out between Britain and Germany, the Royal Navy must find a way to sink the German U-boats before they cut off their vital transatlantic shipping routes.

Dönitz's U-boats continue to terrorise the transatlantic routes; in Britain, the WRENS prepare to frustrate his plans, while the Royal Navy turns to a retired war gamer.

Captain Gilbert Roberts thinks he knows how the German U-boat threat can be banished, but Admiral Percy Noble reacts rather frostily to his suggestions. To convince him, Roberts urgently needs further support.

With the help of the buttercup tactics, the Royal Navy wants to fight the attacks of the German submarines, but Gilbert Roberts and Jean Laidlaw discover a fatal flaw in this approach.

Following a promotion, Dönitz now has the power to fill the Atlantic with more and more U-boats. The Battle of the Atlantic reaches a turning point when convoy ONS.5 catches Dönitz's attention.

When convoy ONS.5 enters the most perilous part of its journey, an area of the Atlantic that could not be reached by conventional air cover, Dönitz unleashes his wolf-packs.