An encounter with the gods binds the fate of young herdsman Paris to that of his home city of Troy, and when he is granted the honour of visiting Sparta as a guest of King Menelaus, he falls in love with the beautiful queen Helen, with far-reaching consequences that threaten to bring an empire to its knees.
Helen and Paris reach Troy, to face the alarming consequences of their elopement. Helen’s husband rages at her disappearance, and his brother Agamemnon inspires a Greek army to attack Troy and get her back. Odysseus, King of Ithaca is sent for, but he is too unwell to join the coalition. Priam and Hecuba debate whether to send Helen back or face the repercussions. In Aulis, the winds aren’t in their favour and the fleet can’t leave. The goddess Artemis presents Agamemnon with an agonising dilemma.
With the Greeks' grip on the city tightening, Hector and Paris embark on a dangerous journey to a nearby ally to ask for help. Relying on each other for survival tests and strengthens their bond, but a familiar face reappears to tell Hector the disturbing truth about his brother.
Achilles' shock attack on Troy's ally Cilicia devastates the Trojans and puts the spotlight on Helen. Andromache receives both good news and bad. A bitter dispute erupts between Agamemnon and Achilles.
Paris is hunted by the Greeks and returns to his former life, leaving Helen without an ally in Troy just as Pandarus's investigation gathers momentum. The Trojans attempt to take advantage of the divisions within the Greek camp.
The Trojans receive a message from the gods and embark on a daring raid with new allies. Helen's situation remains precarious. Achilles is provoked into returning to battle.