Almost all the great and brilliant people kept records. In them they reflected their thoughts, discoveries, describing them. Not everything can be put into practice, much remains on paper, from which these notes are very valuable. Our hero is an engineer-inventor and is working on one very interesting project. But lately his work has stalled. Something is missing and he wants to see the records of his teacher, who died several years ago. The hero asked his daughter to show him the diary, but she could not find him. Help them search the apartment and find a small black notebook in Diary of a Genius.