Burke and Salty fend off fires caused by MIGs, then shoot their fire extinguisher foam at the MIGs, making them crash. After escorting a commander to a UN base, Burke and Salty encounter a speedboat of Chinese agents who try to board and capture their destroyer, but once again they use the foam to blind their enemies and take them prisoner.
A Chinese submarine and destroyer working in tandem ambush the US destroyer Invincible and badly damage it, but the crew make quick repairs, refusing to see the ship scuttled; they return to the fight and this time outsmart the submarine and destroyer, demolishing both.
Burke and Salty are on a boring shore leave when they hear a call to help reinforce the frontline against the Chinese. They join soldiers from England, Ethiopia & Turkey in battle, with Burke even building a raft to help rout the Chinese from their flank.