An annoyed mother sends her little daughter back to the playground to retrieve a forgotten jacket. She hears a whistling behind the curtain of snow. The little girl follows the lure and vanishes without a trace a child murderer is afoot. The police are helpless and are progressing at idle speed. The Minister of the Interior exploits the incident politically for his own purposes. The press is instigating, and the people get more and more nervous the city seems full of suspects. More and more children disappear, and as the dead bodies appear in the melting snow, the situation escalates. The only focus is on finding the killer, and it soon becomes a public case. Total surveillance, fake news, agitation in the net, and arbitrary arrests. The criminal underworld is made to look like fools. In a turn of events, they actually do the work of the police and search for the murderer themselves. M: A City Hunts A Murderer is a contemporary reimagining of Fritz Lang's 1931 thriller M.