Living with ghost-obsessed parents since birth, Danny had to put up with his parents' "unique" personalities, which often traumatized him. Danny wanted to be an astronaut when he grew up and, unlike his parents, had no interest in hunting ghosts. However, this did not stop his curiosity that one day changed his life forever. While exploring his parents' laboratory, Danny accidentally activated the newly-built Fenton Ghost Portal, causing his molecular structure to become infused with ectoplasm. This causes Danny to become half-human and half-ghost and gain an array of ghostly superpowers. Since the incident, Danny uses his ghost powers to battle against other supernatural entities who pose a threat against his hometown Amity Park, and eventually becomes the city's hero as well as the world's.