Hercules returns to Éire from the Norselands and Morrígan convinces him to stay permanently. Content with settling down with a new family, he later has a prophetic nightmare. Upon waking up, he finds the Druids slaughtered and learns that it was Dahak. Having also seen Nebula in his nightmare, Hercules and Morrígan travel to Sumeria to figure out what is going on. Dahak has indeed entered the world and his current host is a big surprise to Hercules.