Laura Cadieux is heading to the doctor with her young son and her best friend, Madame Therrien. Her son disappears at a metro station, and Madame Therrien rushes off to try to find the kid. Moments later, Cadieux spots her son on the other side of the subway platform, but Madame Therrien is unaware of the reunion and spends most of the film looking for the tyke. Her search provides no small amount of comedy as she berates a succession of subway cops and security guards...