Players compete against each other to determine who stole Lokita Posperita’s pearl necklace in a limited number of turns. This is accomplished by looking at pairs of evidence cards at different locations around the steamship and attempting to make a match. Players can switch cards with those on the board to either create matches or throw off their opponents ("red herrings"). The player who gathers the most evidence by the time the steamship Cleopatra pulls into the harbor in Cairo wins.