500英尺 below the ocean's surface, the American nuclear submarine Colorado faces a chilling order to launch a nuclear missile at Pakistan. This secure channel is used only when America experiences a nuclear attack on its homeland. Captain Marcus (Andre Braugher) demands confirmation of the order, but suddenly receives a directive from the White House to relieve him of his duties. First Officer Sam (Scott Speedman) takes command, yet he too refuses to launch without confirmation, prompting the U.S. government to declare Colorado's crew mutineers and order an attack on the submarine. Despite escaping a near-death experience, Colorado is severely damaged and forced to flee towards the Pacific. Under Captain Marcus' command, this warship carrying 24 nuclear warheads eludes pursuit and reaches Saint Mary's Island in the Pacific, seizing a NATO listening post there. They proclaim the establishment of the world's smallest nuclear nation, causing shockwaves around the globe. America's politicians are left dumbfounded, swearing to take any measure necessary to eliminate this terrifying threat...