Tasked to expose a coin counterfeiting scheme, Luca and Isolde travel to Venice just in time for Carnival. Amid the masks, parties, and excitement, the romantic attraction between the two reaches a new intensity that neither can deny. Their romance is interrupted by the arrival of the alchemist, who may be the con artist they've been looking for. But as Luca starts to investigate the original charge, the alchemist reveals his true goal.