Danny Phantom centers on the life and adventures of 14-year-old Danny Fenton, an unpopular but good-natured boy attending Casper High School in the small town of Amity Park. He lives with his eccentric ghost-hunting parents, Maddie and Jack, and an overbearing 16-year-old sister, Jazz (short for Jasmine). Upon pressure from his best friends, Sam and Tucker, he decides to explore the Ghost Portal that his parents had created in a failed attempt to bridge the real world and the Ghost Zone (the ghostly parallel universe of Earth). Once inside, Danny accidentally presses the "On" button (which his naïve parents failed to do), activating the portal, which infuses his DNA with ectoplasm, transforming him into a half-ghost boy.