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 and can no longer sustain the walls of Tartarus which are crumbling, and the imprisoned Titan Kronos will soon be free. Perseus, valuing his family's safety, refuses to get involved.
Zeus meets his brothers Hades (Ralph Fiennes) and Poseidon (Danny Huston), and his son Ares (