Perseus (Sam Worthington) learns to fight from Io (Gemma Arterton).br br Born of a god but raised as a man, Perseus (Sam Worthington) is helpless to save his family from Hades (Ralph Fiennes), vengeful god of the underworld. With nothing left to lose, Perseus volunteers to lead a dangerous mission to defeat Hades before he can seize power from Zeus (Liam Neeson) and unleash hell on earth.