AVATAR: Murder by Moonlight.

Aang and co. travel back to The South Pole for a little rest and relaxation, (and so Aang can have a good opportunity to propose to Katara) but their vacation is cut short when the gang hears rumors of the spirit of Yue appearing in a newly founded neighboring Water Tribe village. So now the mystery is on to find out whether this Yue is the real Yue, or else a imposter bent on their own unknown purposes.