ten years after battling the kraken, perseus (sam worthington) lives a simple life as a widower fisherman raising his son helius (john bell). zeus (liam neeson) visits perseus, asking for help, revealing that kronos, the leader of the titans, is escaping from the underworld and the walls of tartarus-where the titans are imprisoned-are crumbling thanks to humanity's lack of prayers which is also causing the gods' immortality to drain. perseus declines, valuing his family's safety.