The hero works as Santa Claus at the Radost congratulations agency. Waking up on New Year's morning, he finds in his bag several letters from children asking for a New Year's gift. But all the letters were sent thirty years ago. And then he goes to these addresses and gets to know the senders, learning their stories. Meanwhile, in the area, someone dressed as Santa Claus is robbing the apartments of those who have left for the winter holidays. And then there’s almost a detective story with police arrests, good swindlers, and unexpected coincidences. And the secret of these and many more similar letters is revealed, which never reached Santa Claus. And everyone has the same story. Something had to be done about this. And they came up with...