Director Anthony Maras's historical thriller film is an adaptation of the documentary "Surviving Mumbai" (2009). It dramatizes the actions and sacrifices made by the staff of the Taj Mahal Palace Hotel: one of the major locations that was targeted by terrorists during the 2008 Mumbai attacks. The ten members of Lashkar-e-Taiba assaulted their victims with high-end weapons and explosives over a four-day period.