The smile of Roman Viktorovich Mordvinov is the calling card of the entire pedagogical school! But once upon a time, even before he discovered the secrets of the mysterious lake, began to serve the Black Stone and met the charming mermaid Nadel, he was an ordinary Romka - clumsy, ugly and completely devoid of charm! Roma, unrequitedly in love with the blond beauty queen...Many opportunities open up for the Guardian of the Book of Life. But is this where human happiness lies?