Perseus sets out to rescue his father, who is deceived into captivity by his brother, Ares and uncle, Hades. To do so, he must defeat Ares and Hades who have joined forces with the mighty Titans. A decade after he defeated The Kraken, Perseus (Sam Worthington), the demigod son of Zeus (Liam Neeson), now lives as a fisherman with his 10-year-old son, Helius (John Bell). One night, Perseus is visited by Zeus, who tells him that the powers of the gods are fading and the walls of the Underworld prison of Tartarus are breaking due to the lack of prayer from humans and states. The they will need the world’s armies to combat the potential threat, but Perseus shows little interest and refuses to get involved.