The film is set in a radio studio in Canada on a cold day. The news reporters in the city speak of the strange behavior of a group of people who start eating each other, to devour without apparent cause. Something happens, something strange, something that has no apparent explanation, you cannot define. The announcer of the radio studio, discover the enigma: it is a bad transmitted through language, there are words that turn into murderers to the villagers.
Pontypool proposes the idea that the proper use of certain words could reconfigure the will of the person who hears them, understands them, ...