In Ancient Egypt, Ema "Emmy" Heshire (Kim Cattrall) hides in a pyramid from her mother, who wants her daughter to marry against Emmy's will. Emmy prays for the gods to get her out of the mess and to find her true love. The gods answer her prayer by making her disappear.
Hercule, jeune pêcheur provençal, hérite d'un grand journal quotidien parisien : L'Incorruptible. Le publicitaire Vasco, qui se fait nommer rédacteur en chef, tente d'utiliser ce journal pour monter des escroqueries. Aidé par sa secrétaire, Hercule parvient à se débarrasser de Vasco puis nomme un jeune journaliste intègre au poste de rédacteur en chef avant de regagner sa Provence natale.
Before the dawn of man or beast, immortals waged war against each other in Heaven. The victors declared themselves gods while the vanquished were renamed the Titans and imprisoned beneath Mount Tartarus. The Epirus Bow, a weapon of immense power, was lost on Earth during the war. In 1228 B.C., the mortal king Hyperion (Mickey Rourke) of Heraklion searches for the bow, intending to use it to release the Titans to get revenge on the gods for failing to save his family. Hyperion captures the virgin oracle Phaedra (Freida Pinto), believing that she can use her visions to find the Epirus Bow's resting place.
Hercules (Dwayne Johnson) is the leader of a band of mercenaries comprising the spear-wielding prophet Amphiaraus (Ian McShane) of Argos, the knife-throwing thief Autolycus (Rufus Sewell) of Sparta, the feral warrior Tydeus (Aksel Hennie) of Thebes, the Amazon archer Atalanta (Ingrid Bolsø Berdal) of Scythia and his nephew storyteller Iolaus (Reece Ritchie) of Athens. Hercules is said to be the demigod son of Zeus, who completed the legendary Twelve Labors, only to be betrayed by Hera who drove him insane and caused him to murder his wife Megara (Irina Shayk) and their children during a visit to King Eurystheus (Joseph Fiennes). Throughout the film, it is not clearly established that Hercules is truly the son of Zeus, and many are skeptical of the claim as well as of the stories of Hercules' famous Twelve Labors. Despite this, Hercules is frequently seen displaying unusual strength and nigh-unmatched skill in combat. Hercules is frequently haunted by the memory of the deaths of his wife and daughters by his hand, as well as visions of Cerberus.
In New York City, Zeus and Poseidon meet at the top of the Empire State Building, where Zeus reveals that his master lightning bolt has been stolen and accuses Poseidon's demigod son, Percy Jackson, of the theft. Poseidon reminds him that Percy is unaware of his true identity, but Zeus declares that unless his master bolt is returned to Mount Olympus before the summer solstice, in two weeks' time, war will be waged between all the gods.
Le mythe de Médée revisité par De Bernardi, et transposé au monde contemporain. Irène est une femme venue d'Europe centrale, qui exerce le métier de chanteuse dans un cabaret; elle est mariée à Jason, patron d'un bar. Mais tout se retourne contre Irène qui voit sa vie se désintégrer, d'abord par son mari qui, ayant rencontré quelqu'un d'autre, la quitte et refuse de lui laisser les enfants; puis par les problèmes financiers qui la mènent à l'expulsion. Irène est submergée par des idées de mort.
Depuis 10 ans, les Grecs assiègent la ville de Troie pour rendre à Ménélas, roi de Sparte, la belle Hélène (son épouse) enlevée par le prince Troyen Pâris avec l'aide de la déesse Aphrodite. Achille vient de tuer le valeureux Hector (frère de Pâris et fils du roi Priam), qui avait tué Patrocle, proche compagnon d'Achille. Priam vient demander à Achille le corps de son fils. Après de longues discussions, le roi troyen parvient à récupérer le cadavre de son fils aîné pour lui accorder les funérailles dignes de son grade de prince.
Le film montre les douze travaux d'Hercule sous forme de personnages de papier découpé inspirés par le théâtre de marionnettes. Les personnages sont dessinés en noir et blanc dans des graphismes inspirés par la céramique grecque antique.
Hélène, reine de Sparte, s'ennuie, son mari Ménélas lui montrant peu d'intérêt. Elle s'enfuit à Troie avec Pâris. Ménélas déclare alors la guerre à Troie. Après la victoire, Hélène revient à Sparte. La coutume voudrait que son mari la tue lui-même, mais son charme opère et il la laisse en vie. Toutefois il ne s'occupe pas plus d'elle qu'auparavant et Hélène flirte avec le prince d'Ithaque.
In ancient times after defeating their predecessors, the Titans, the gods divided the Universe among themselves. Zeus took the skies, Poseidon took the seas, and Hades was left with the Underworld upon being tricked by Zeus. The gods created the mortals, whose faith and prayers assured the gods' immortality. As time passed, however, mortals began to question them and soon resist their creators, angering the Olympians.
In the summer of 2006, Percy recounts the story of Thalia and her sacrifice. A young Annabeth, Luke, Grover and Thalia are running to Camp Half-Blood while being pursued by monsters. Thalia sacrifices herself to get the others into the camp, and her father Zeus transforms her into a pine tree, creating a magical border around the camp. Soon a Cyclops passes through the border and is revealed to be Tyson, Percy's half-brother. The camp is later attacked by a Colchis Bull who breaks through the border and ravages Camp Half-Blood. Percy defeats it with the help of Tyson, Annabeth, and Clarisse. Following this, Luke Castellan (who had survived his and Percy's battle in the previous film) appears and confronts Percy, trying to convert him to his cause. When Percy refuses, Luke disappears.
Perseus (Sam Worthington), a son of Zeus (Liam Neeson), lives as a fisherman after the death of his wife, Io (portrayed by Gemma Arterton in the previous film), with his young son, Helius (John Bell). Zeus visits Perseus and asks for his help, saying that humans are not praying to the gods and as a result the gods are losing their power and becoming mortal. Perseus realizes the walls of Tartarus are crumbling and Zeus informs him that the imprisoned Titan Kronos will soon be free. Perseus, valuing his family's safety, refuses to get involved.
Ulysse approche de la grotte du cyclope Polyphème. Fatigué, il s’endort devant. Des nymphes musiciennes sortent alors de la grotte, jouent de la musique et jettent des fleurs sur le héros endormi. Calypso arrive, le réveille, alors que les jeunes filles s’éclipsent. Elle l’attire devant la grotte, puis disparaît, laissant la place à la main du cyclope qui essaie d’attraper Ulysse. Le géant sort ensuite sa tête et le héros lui transperce son seul œil avec une lance. Ulysse part alors, Calypso tente en vain de le retenir et pleure au milieu de ses amies.