A team of American security contractors stationed in Benghazi, Libya, find themselves thrust into a desperate battle when Islamic militants launch coordinated attacks on a nearby US diplomatic compound in 2012. Despite orders to stand down, the contractors defy their superiors and race to defend the besieged facility and the personnel trapped inside. The film follows the men as they fight through the night, drawing on the true events surrounding the deaths of the US Ambassador and several others during the prolonged siege.