The film tells the story of August 1945, when the US military was about to attack mainland Japan, the I-77 submarine was ordered to launch an attack as the final line of defense. Captain Kuramoto (played by Hiroshi Tamaki) refuses to use the human torpedo "Hikari" (a type of suicidal torpedo operated by humans) and has sunk it using only ordinary torpedoes before
The film tells the story of August 1945, when the US military was about to attack mainland Japan, the I-77 submarine was ordered to launch an attack as the final line of defense. Captain Kuramoto (played by Hiroshi Tamaki) refuses to use the human torpedo "Hikari" (a type of suicidal torpedo operated by humans) and has sunk it using only ordinary torpedoes before