The Bell of Girardius

Miranda Blake, the curator of one of the Legacy's museums, calls Derek when there is a break in at her workplace. When Alex checks the inventory she realises that the only thing missing is The Bell of Giradius, a mystical item reputed to bring the dead back to life. The questions the Legacy need to find out are where is the Bell, who took it and does the recent death of Miranda's fiance have anything to do with it's disappearance?