A decade after his heroic defeat of the monstrous Kraken, Perseus-the demigod son of Zeus-is attempting to live a quieter life as the sole parent to his 10-year old son, Helius. Meanwhile, a struggle for supremacy rages between the gods and the Titans. Dangerously weakened by humanity's lack of devotion, the gods are losing control of the imprisoned Titans and their leader, Kronos. The Titans' strength grows stronger as Zeus' remaining godly powers are siphoned, and hell is unleashed on earth. Enlisting the help of the warrior Queen Andromeda, Poseidon's demigod son, Argenor, and fallen god Hephaestus, Perseus bravely embarks on a treacherous quest into the underworld to rescue Zeus, overthrow the Titans and save mankind.