When a chance encounter with a pickpocket leads to something more sinister, avid sleuth Patricia Fisher swings into action. The Aurelia is on its way to Thailand, but a mystery illness is spreading among crew and passengers. Is there a link between it and a world-famous immunologist on board? There is something very strange about his companions and their behaviour, but no one wants to listen to Patricia's outlandish theories. When people she cares about join the growing number of sick people, Patricia sees no option other than to trace the cause for herself. Finding the truth will lead to her craziest caper yet. Be ready for more hi-jinx aboard the world's most luxurious cruise ship.