AKULA
Submarine action
India sold US military radar based on Russian submarine stealth technology. Captain of the Russian submarine received an order to eliminate the ship that transported the radar to US. The AKULA sub is trying to escape from US territory after the ship destroyed. American coastal guard has detected unknown submarine but they have no NAVY around to catch it and discover the attacker country. Instantly, AKULA received sonar contact on the depth of 650 meters when the sub almost escaped. AKULA was not alone. 
Based on Flashpoint and Sub Command games. 
Music –  from Sub Command game.