Part 2 of Vlad Plasmius placing the entire town of Amity Park in jeopardy when he accidentally releases the evil Ghost King, Pariah Dark, who invades both the ghost and mortal worlds. Even worse, all of the Ghost Zone residents flee their homes out of fear of the Ghost King and his armies, and Vlad is hiding out from the Ghost King in the Fenton Household. In order to combat this growing threat, Danny must team up with Vlad and several other foes to work side by side to stop the King of All Ghosts. Meanwhile, Valerie also fights alongside Danny as she grows feelings for him as well In this episode, Danny Phantom verifies his ghost name to the people of Amity Park. (thetvdb.com)