The U.S. submarine USS Tampa Bay vanishes while shadowing the Russian Akula-class submarine Konek in the Arctic. Rear Admiral John Fisk (Common) sends the Virginia-class submarine USS Arkansas, under the command of newly-promoted and unorthodox Commander Joe Glass (Gerard Butler) to investigate. At the same time, a Navy SEAL team under the command of Lieutenant Bill Beaman (Toby Stephens) is sent in to discreetly observe a Russian naval base, but their mission is swiftly complicated when Martinelli (Zane Holtz), the team’s new designated marksman recruit, is rendered injured during the HALO drop. When they arrive at the naval base, they witness defense minister, Admiral Dmitriy Durov (Mikhail Gorevoy), conducting a coup d’état and taking Russian President Nikolai Zakarin (Alexander Dyachenko) prisoner, and swiftly realize that Durov intends to trigger a war.