If Romka had not slept through the required stop on the train and ended up in an unfamiliar village, it is unlikely that he would have been able to once again demonstrate to the world his detective abilities! In one house, a large sum of money disappeared from a locked room. All suspicions fall on the homeless child Ruslan. After all, only a kid like him could crawl through the narrow window and steal the money. Moreover, the boy ran away as soon as he was asked a few questions. Now Romka is determined to get ahead of the police and real adult detectives and be the first to find the thief!