1982. The Falklands war. Young SAS trooper, Mark Black, risks his life to capture an Argentine girl spy. Twenty years on and an Argentine military junta is returned to power. They determine to reinvade the Falklands Islands. Now a senior NCO, Black is back in the South Atlantic, haunted by memories he thought he had buried. A team from the crack SAS Mountain Troop is inserted by submarine. But has the mission been compromised from the start? When fate throws Black together with the girl from his past, he is faced with a conflict of loyalties.