Scobby-Doo: Clue

Mrs. White is experiencing a spell of abductions at her Haunted Mansion.  In distress over this situation, she has invited Scooby-Doo and the gang over to investigate.  While working on the case, someone else is abducted by the Monster that lurks within the walls!!! To win, you must solve:  Who was abducted, Where?? and what item did the Monster leave behind