Keys to the Secrets of the Past

Nikita Kotikov inherits a diary from his grandfather, full of mysterious puzzles. In it, the hero finds a letter in which his grandfather asks Nikita to uncover his last secret and to outpace the black diggers also pursuing the artifact. By a happy coincidence, the hero, along with his parents, is headed to his grandmother's house, where a hint from the diary is located. With each step, Nikita and his family get closer not only to unraveling his grandfather's secret but also to the dangers that this secret carries.