The director of the orphanage, Andrey Mast, is fighting the lawlessness reigning there and introducing strict rules. The new pupil Inna opposes these rules and will seek justice in her own way.

Eight-year-old Nikolai suffers from a congenital illness that leaves him unable to walk or speak. His doctors and even his own mother, Tatyana, have given up hope of treating his ailment. When Tatyana’s new friend Yuri tries using his own physiotherapy techniques to treat Nikolai, he discovers that Nikolai has a gift for music and teaches him to play the piano. With every note he learns and every melody he masters, Nikolai’s condition improves. He not only gains mobility, he also becomes an outstanding musician. Nikolai and Yuri travel to China together to take part in a piano competition, with a view to taking the grand prize. This is a humor-packed story about the healing power of music and fatherly love.

Colleagues at work - Anna Sergeevna and young Lena - come to rest in a country sanatorium and become unwitting witnesses to the crime. They begin their dangerous investigation and feel that they, too, are in trouble. Trouble is everywhere here, everything around is saturated with it. Danger weakens and excites. Everyone is infected with danger, including the main suspect - Georgiy.