Danielle's warning

Danny Fenton is your average 14-year-old. Or is he? See,Danny Fenton is also Danny Phantom, ghost boy or whatever you may call him. When Danny came back from fighting a ghost, His cousin Danielle or Dani tells him some interesting news about a New ghost girl in the ghost zone. Who is this mysterious ghost?;)
Will Danny be able to save her from her past or will darkness prevail.