The narrative opens with a burly, overly oiled King Leonidas of Sparta evaluating his newborn son, Margo, by dangling him over a cliff and kicking him into a pit when he dislikes his
appearance. Years later, an effeminate Persian messenger arrives in Sparta demanding tribute consisting of earth and water. Outraged by the insolence, Leonidas and his men violently kick the messenger and a group of tourists into a deep sinkhole, effectively declaring war against the megalomaniacal Persian King Xerxes.Seeking divine guidance for the impending conflict, Leonidas visits the Oracle of Delphi. The Oracle, depicted as a hideous, mutated teenager on television, demands a bizarre ritual involving a heavy drug-tripping dance number before prophesying that Sparta will fall unless Leonidas can secure the backing of the Ephors, a council of grotesque, deformed mutants who control the state's finances. Leonidas offers them immense bribes, but the Ephors, who are secretly in league with Xerxes, decree that Sparta cannot go to war during the sacred festival of the Carneia. Bound by this religious technicality, Leonidas decides to circumvent the law by assembling a
suicide squad of precisely thirteen elite warriors, declaring they are merely going for a casual stroll rather than an official military campaign.As the squad marches toward the narrow pass of Thermopylae, they are joined by the cowardly Spartan Dilio, whose eyes are famously wide with enthusiasm. Along the way, they encounter a disfigured, hunchbacked outcast named Paris Hilton, who begs to fight for Sparta. Leonidas kindly rejects her due to her inability to lift a spear high enough, driving her into the arms of Xerxes, who immediately gives her a makeover and welcomes her betrayal.At the hot gates, the Spartans meet a bizarre array of opponents in the impending battle. Xerxes sends waves of fantastical warriors, including mutants, ninja fighters, and giant wrestlers, but the Spartans effortlessly dispatch them using choreographed Spartan combat techniques, shield walls, and excessive pop-culture references. Despite their unmatched valor, the betrayal by Paris Hilton proves fatal, as she reveals a secret goat path to the Persian king, allowing Xerxes’ massive forces to encircle the tiny Spartan army.Knowing their doom is sealed, Leonidas bids an emotional farewell to Queen Gorgo, who remains behind to rally the political elite through physical combat. Surrounded on all sides by countless Persian soldiers and pop-culture icons, Leonidas and his twelve remaining warriors stand tall, ready to embrace their glorious, albeit ridiculous, demise in defense of freedom. In the final, chaotic climax, a rain of arrows strikes down the heroic king, but not before he delivers one last parting shot at his enemies, cementing the legend of the thirteen Spartans in infamy.