In the 18th installment of the award-winning adventure series, the Italian police have asked Nancy Drew for help in unraveling a crime ring that is threatening to steal all of Venice’s priceless artifacts. Assuming the role of Nancy, players arrive in Venice during Carnival and begin taking on a series of challenges, including an undercover spy mission for the Italian police. Along the way, players must take advantage of the unique Venetian culture such as learning the language and navigating the transportation system (gondola or walking) to accomplish the mission at hand.

As the game progresses, the masked thief becomes bolder and players will need to correctly identify the phantom before he or she goes too far.