Due to bad weather, gymnast Katya Prokhorova, going to international competitions, ends up in her hometown of Razlelsk and, arriving at the school where she once studied, meets a young singing teacher and falls in love with him. A few days later she leaves, and upon returning from the competition, she confesses to him that she has fallen in love with someone else. Time passes. The singing teacher becomes a famous composer, but does not stop loving and waiting for Katya...

The grandfather of fifth-grader Gleb Borodaev was a famous detective writer, but he died before he could finish his last horror book. A novel based on a real story - the mysterious disappearance of man called Dachnik in Borodaev's country house. Gleb and his five classmates, including amateur detective Alik Detkin, decide to uncover this secret on their own.