William A. Talbot, Glenn Ford, is a decorated United States Navy submarine commander whose vessel, the USS Bluefin, is tasked with maneuvers that simulate the sinking of the aircraft carrier USS Midway, which is transporting a senator to witness the test firing of a V-2 rocket from its flight deck. In the drill, the Bluefin executes a torpedo-like strike but is detected by a nearby destroyer, which conducts a depth-charge attack that mimics the Bluefin’s destruction. The exercise underscores the fragility and high stakes of naval warfare, even in a controlled training environment.
After witnessing the successful surface launch of the V-2, Talbot argues that his attack would have succeeded if the Bluefin had been equipped with a guided missile. The Navy acknowledges the possibility and orders Bluefin and its crew to the Pacific Missile Test Center at Naval Air Station Point Mugu for a brief period of training and familiarization. En route, Bluefin inadvertently damages a fishing net belonging to Lars Hansen’s fleet, John Qualen who portrays Lars Hansen, a Danish captain whose boats operate in the area when the missile tests are not underway. This incident adds a layer of friction between the Navy and local fishermen, setting the stage for later tensions.
The crew grows impatient with the somewhat slowing and bureaucratic training regime and tries to rush the process, even attempting to procure their own equipment. Their efforts are thwarted by the strict security at the base, which guards the sensitive missile technology and deployment plans. Talbot’s personal life becomes tangled with the mission when he meets Karin Hansen, a Danish native who serves as the base commander's secretary. Karin, portrayed by Viveca Lindfors, is the niece of the irate Captain Lars, adding a personal dimension to the professional conflict. Talbot’s approach to Karin is inappropriate, and she loses her job after revealing critical information about the missile parts location.
Despite the setback, Talbot secures the necessary missiles and parts for a trial launch, though the outcome proves costly. His haste and reckless decisions culminate in a serious injury to himself and the death of his close ally, Fuss Payne, the quartermaster portrayed by Joe Sawyer. The tragedy deepens Talbot’s crisis of confidence; he becomes depressed and saddled with braces, facing the real threat of a medical discharge.
In a turning point, Karin encourages Talbot to seize command during a military exercise that deploys a submarine flotilla to attack a surface fleet. This moment reframes the test as a strategic shift: Talbot conceives a plan for missile-carrying submarines to launch their payloads, with closer submarines originally assigned to torpedo duties guiding the missiles toward the target surface fleet. The concept highlights a forward-thinking approach to submarine warfare, balancing risk with innovation, and it marks Talbot’s path toward redemption as a leader who can adapt under pressure.
Throughout, the story blends technical ambition with human consequence, showing how ambition, danger, and loyalty intersect on the edge of modern naval warfare. The cast of characters, from the steadfast officer to Karin’s challenging liaison with the Danish nautical community, anchors a narrative about trust, responsibility, and the high costs of pushing military innovation ahead of established norms.
