Roxy Hunter and the Mystery of the Moody Ghost (2007)

After moving to an eerie old house in the country, nine-year-old super sleuth Roxy Hunter stumbles into a world filled with unsolved mysterieus, secret plots and spooky spirits! Now, Roxy and her best friend and boy genius Max, must race to save their home, re-unite a lost love and uncover the true villain. Is it the Moody Ghost...or something even spookier?