Early summer 1982, winter in the South Atlantic, and Argentina’s military junta invades the Falklands and South Georgia. Within days a Royal Navy Task Force is assembled and British forces dispatched.

This is the story of D Squadron, 22 SAS, commanded by Cedric Delves. The Squadron will be in at the start, at the repossession of South Georgia; and they will be there at the end, still going forward. Theirs will be the first Union Jack raised over Government House in Stanley, signifying the end of the war.

This is more than a tale of derring-do, although the events and their relentless tempo defy belief. Angry seas, inhospitable glaciers, hurricane force winds, an Argentine submarine, helicopter crashes, raids behind enemy lines –– all these and more are in the mix. 'Across an Angry Sea' is a chronicle of daring. The Squadron prevails, but the cost is high. They lose a third of their fighting strength.

This is a portrait of a tight knit SAS band of brothers at war. It doesn’t always go right. But the Squadron learns fast. They win through and at all times fight hard, with determination, skill and steadiness, never losing sight of their humanity.