In April 1942, during World War II, the largest naval battle in history was underway in the Atlantic Ocean. German Reich adopted the "wolf pack" tactics and dispatched a large number of U-shaped submarines to rampant activities in the North Atlantic waters. Many Allied Forces ships carrying strategic materials were sunk by German submarines on the east coast of the United States, but the United States Navy was unable to decipher its radio. The communication code does not pose much threat to the German submarine.
The American submarine S-33, commanded by Captain Hash and Major Cournan, was ordered by the commander of the fleet and set sail in secret. Their "luggage" was a lot of wooden boxes, but the crew did not know what was inside. It wasn't until S-33 sailed into the deep sea that the mission of this trip gradually became clear: S-33 will become a "Trojan horse", and these boxes will disguise it as a Nazi U-shaped submarine. They will merge with another stranded German submarine to seize the cipher machine on board, and Allied Forces can use it to stop the Nazi "wolves" from attacking.
The 9-person team risked their deaths and forcibly boarded the German U-571 submarine to capture the code transmitter. According to the original plan, they would destroy the U-shaped submarine and bring the captives back to the United States without the enemy's awareness. Unexpectedly, something happened, but they were trapped in the enemy's submarine. He was rushed by German reinforcements and blew up the American submarine in response. The 9-man squad was forced to fight back on the heavily damaged U-571. Unexpectedly, the German destroyer with stronger firepower would ensued. There is only one torpedo on the U-571. It is full of unfamiliar German how to control the instrument. The submarine trapped in the 100-meter deep sea is always torn apart by the water pressure, and the depth of the water is thrown by the German destroyer. charge . In this battle, there is not much time to carry out a series of hunts on the seabed. In the face of this dangerous waters and submarines that do not know how to drive, the fate of these ordinary people and the success of the mission can only rely on mutual trust and intuition.
