Socialite Jean Howard (Ida Lupino) is stirred to patriotism and eager to help the war effort. When she overhears her father, J. R. Howard (an uncredited Paul Harvey), complain that the military has taken all of the salesmen of his oil rig supply company, she volunteers to take their place. J. R. gives in, though he reminds her that she has never worked a day in her life.
Grazia Mancini (Nadia Cassini) is an aspiring night club singer. Her boss Eva (Karin Schubert) has a lover, John (Elio Zamuto) who is a trafficker of stolen art works. The two learn of valuable paintings hidden in a military mental asylum managed by mentally instable Professor Amedeo Larussa (Lino Banfi). They blackmail Grazia and send her to the mental asylum in the guise of a substitute nurse to learn the whereabouts of the paintings.
Set "Somewhere in the South Pacific", Gruber's gambling scheme backfires when he tries to raise lots of money for St Theresa’s Orphanage through off-track horserace betting. Heavy bets on the horse "Silver Spot" leaves the crew owing a large sum to sailors and marines. A little while later when the crew is in New Caledonia and after Ensign Parker is kissed by Andrea Bouchard (Claudine Longet) the lightheaded Parker accidentally sets off a depth charge and destroys the dock and cargo of businessman Henri Le Clerc (George Kennedy), leaving the crew even more in debt. However, while on a reconnaissance mission to an island the crew comes across Silver Spot who was lost on the island after the horse was being moved from Australia. They decide to enter Silver Spot in a race in New Caledonia to win enough money to pay all their debts. Otherwise the only way to pay all their debts is for McHale to marry his old flame Margot Monet (Jean Willes) who owns a gambling parlor in New Caledonia (but who McHale would rather not marry). They try to disguise the horse with lots of heavy hair, but when the hair starts to come off during the race they decide to use a smoke screen from the 73 to keep anyone from seeing too much. However, this made it impossible for the racetrack authorities to know who won. But the smokescreen also caused a Japanese submarine to be captured by the 73. In the end Le Clerc is so grateful for saving his town from a Japanese attack he forgives the debt. The crew also gets a reward for rescuing Silver Spot which just happened to be enough to pay the sailors and marines. While all this was going on the Pt-73 crew was dogging Binghamton (Joe Flynn) and his aide Carpenter (Bob Hastings). And just as they were leaving New Caledonia the bashful Parker is kissed by Bouchard and again the lightheaded Parker sets off another depth charge which destroys Le Clerc's dock and cargo again. But rather than marry Monet to pay for the new damage, McHale and crew immediately scramble to get out of New Caledonia.
U.S. artillery corporal Marion Hargrove (Robert Walker) finds himself at large in wartime France with wheeler-dealer pal Pvt. Thomas Mulvehill (Keenan Wynn). Inadvertently detached from their outfit, Hargrove and Mulvehill wander into a French village, where they're lauded as conquering heroes by the populace,
The movie starts out with a meeting between the rulers of Baekje, Silla, Tang China, and Goguryeo. They are arguing why the Korean southern kingdoms have to pay tribute to China, even though Tang is only 50 years old. The king of Silla sides with the Emperor of Tang. The movie flashes forward to the scene in which Baekje soldiers rush to the king with ill news of Silla and Tang allying together, bringing an army of 50,000 soldiers. The Baekje council discusses battle plans. But in the end, all of the officials run away out of cowardice. The king of Baekje calls for the great warrior, Kyebaek. He accepts the offer to protect his country after three glasses of wine. Kaebaek is forced to kill his family in fear of something worse happening to them. Soon, Gyebaek engages the Silla forces in so called "battles" where the opponents insult the others with Gyebaek winning in the beginning of these battles.
In Korea, AD 668. Kim Beob-min (Hwang Jung-min) is the king of the small southern Korean state of Shilla and makes a deal with China's Tang dynasty officials to have a combined strike against the larger northern Korean state of Goguryeo. The conditions of the agreement involve Shilla being given back the Korean state of Baekje. The combined troops march to Pyongyang Castle, where Goguryeo's Yeon Gaesomun (Lee Won-jong) dies and hands over command of the army to his second son Yeon Nam-geon (Ryu Seung-ryong). This action upsets his first son, Yeon Namsaeng (Yoon Je-moon) who is not as war-hungry as Nam-geon.