We're Mary-Kate and Ashley-the Trenchcoat Twins. Two wuper-duper snoopers who find mysteries to solve wherever we go! Even in an old, abandoned mansion! Mrs. Busybody called. She said there were flashing lights, weird noises, and mysterious fog coming from the empty house across the street. She thought the house was haunted. Whoa! Could there really be a ghost living there? That's what we had to find out.