It was Friday afternoon. Mr. Smart was having a cup of tea when the telephone rang . It was a very strange call. Frightened woman was talking without pause so he couldn't understand anything. He asked: "Madam, calm down , please .Everything will be okey .What's wrong ?" She said that her son was kidnapped. And the kidnappers told not to contact the police . That's why she found him . Mr.Smart was a detective. So , Mr. Smart decided to solve that case . He interrogated her boy's friends and found out that Mark , that was the name of kidnapped boy , had problems with the lack of money .Mark often borrowed money from his friends. Mr.Smart decided follow Mark's best friend .After school he didn't go home and went by bus to the nearest hotel. Mr . Smart was following him .