Maya and Ilya find themselves in the Academy of Shadows - a dystopian educational institution where feelings, emotions, tastes are prohibited, and the whole world is black and white - all this is a project of the underground governor "Dark World", who plans to ultimately turn all dungeons into obedient and exemplary citizens. But it is here, in the most reliable place in the entire Underworld, that the heart of Governor Midnighter is hidden, which must be found and destroyed. The only clue is the phrase “the secret is kept in the unknown.” Maya will have to find the secret student society T.O.P.P., get to the non-existent Faculty of Thieves, visit the Color Fair, again encounter the underground mafia with poisonous tongues, reveal the true identity of the underground governor and come face to face with death... Shadow Academy - the second part of the pentalogy "Nizhneburg".