Pac is a young Pac-Worlder with a belief for ghosts and a big appetite. He has been orphaned since he was young and lives in his dormitory. He has two best friends: Spiral and Cylindria, who support him all the way. One day, Pacster got lost in the school's maze and accidentally finds himself in an unknown ruin. His stumble inadvertently opens a gate to the Netherworld, where ghosts now haunt and terrorize Pac world with his best friend spiral and his Ghost buddy binky inky and Clyde