When the Russian president gets kidnapped in a coup, an American submarine captain leads a rescue mission in the hopes of avoiding all-out war.

Two young soldiers, Bartle and Murph, navigate the terrors of the Iraq war under the command of the older, troubled Sergeant Sterling. All the while, Bartle is tortured by a promise he made to Murph's mother before their deployment.

The story of the miraculous evacuation of Allied soldiers from Belgium, Britain, Canada and France, who were cut off and surrounded by the German army from the beaches and harbour of Dunkirk between May 26th and June 4th 1940 during World War II.