When Danny Phantom -- a shy oddball with eclectic friends and weird parents who also happens to be the target of a bully and the hip-but-twisted school principal -- mistakenly steps into a ghost portal at the wrong time (as if there's a right time) and is turned into a phantom, his whole life changes. Little by little, he transforms, becoming half ninth grader, half phantom. He discovers that he can fly and that whenever a ghost is nearby, a blue vapor trail escapes from his mouth. All of these changes are distressing but exciting -- much like the changes that come with adolescence.