In the summer of 1941, the United States and Japan seem on the brink of war after constant embargos and failed diplomacy come to no end. “Tora! Tora! Tora!”, named after the code words use by the lead Japanese pilot to indicate they had surprised the Americans, covers the days leading up to the attack on Pearl Harbor, which plunged America into the Second World War.

Rick, a down-and-out American boxer, is hired to transport a sword to Japan, unaware that the whole thing is a set up in a bitter blood-feud between two brothers, one who follows the traditional path of the samurai and the other a businessman. At the behest of the businessman, Rick undertakes samurai training from the other brother, but joins his cause. He also becomes romantically involved with the samurai’s daughter.