During rush hour, when men and women pack into trains for their morning commute, physical contact between them can become increasingly sexual. As a result, casual groping may escalate to full-blown molestation. Initially hesitant, the women are unable to escape due to the train's movement. Eventually, they succumb to their own desires and join in with the rest of the passengers, resulting in an energetic and sexual atmosphere on board. The train continues its journey towards a climactic destination.