The teacher Miss Gold has an unusual ring. Once you turn it towards the light, the gem seems to come to life. The reflections in the form of clouds gradually turn into a face. Gloomy and unpleasant. But it’s simply impossible to take your eyes off the ring. Miss Gold explains this by the play of light in the stone. You will find out if this is so by reading another horror film by the master of children's thrillers, Robert Stein.