Created by Shawn Ryan ("The Unit," "The Shield") and Karl Gajdusek ("Dead Like Me"), the high-octane drama focuses on the U.S. ballistic missile submarine Colorado, commanded by Capt. Marcus Chaplin (Andre Braugher).
While submerged, the Colorado receives orders to launch nuclear weapons at Pakistan, over a channel to be used only if the U.S. has been decimated. Suspicious of how the orders were received, Chaplin requests confirmation, only to have the White House unceremoniously relieve him of command.
His second-in-command, Sam Kendal (Scott Speedman), also refuses to launch missiles without confirmation, and suddenly the Colorado finds itself under friendly fire.