About the book: they decided to celebrate the year / Petya’s birthday in the Plague Fort. All the way dad joyfully repeated: “This will be a plague!” Just a plague!” “Plague is the last place where I would celebrate anything...” muttered the captain who was carrying them when his ship ran into a deserted pier. While going through the quest, the guys found many more questions than answers, and instead of prepared surprises, they came across to the sinister secret of the past.