Danny Fenton is a heroic half boy half ghost who defends Amity Park from evil. His family includes his ghost hunting parents Jack and Maddie Fenton and his older sister Jazz Fenton.

One day when Danny walked into the Fenton lab he witnessed his parents trying to get a portal to the Ghost World to work they soon gave up and walked away. Danny decided to see if he could make it work which he did but in the process he became half ghost gaining the abilities to walk through walls, turn invisible, fly, overshadow people, shoot ghost rays, duplicate himself, ice related powers, and a ghostly wail he can also sense when other ghosts are around. His two best friends, Sam and Tucker know his secret along with Jazz and some of his enemies even.