What would happen if the world were a driverless train thundering recklessly over bumpy tracks? Happy passengers are having a great time on a crowded train, oblivious to the unknown fate that awaits them around the bend. When the effects of the shortage that ensues begin to be felt, the result is a class struggle that is as amusing as it is merciless. Naturally there are victims, but in the end everyone is equal. Rarely has a disaster seemed so delightful !