Young Trojan prince Paris (Jacques Sernas) journeys to Sparta, hoping to bring home a peace treaty that will end the war between Greece and Troy. However, his ship is forced to return to Troy in a storm after he has been swept overboard. Washing up on Sparta's shore, he is found by the beautiful Helen, with whom he falls head-over-heels in love, completely unaware that she is the queen of Sparta. At the palace he finds Greek king and Helen's husband Menelaus (Niall MacGinnis), Agamemnon (Robert Douglas), Ulysses (Torin Thatcher), Achilles (Stanley Baker), and others debating whether to go to war with Troy. Menelaus sees that Helen and Paris are in love and, pretending friendship, plots Paris's death. Paris flees back to Troy, taking Helen with him. Paris's action, however, makes matters even worse. The Greeks, who have been feuding among themselves, now unite and set off to attack Troy, devising a unique plan to get inside.