As the train car sways through the evening rush, a group of female passengers senses an unsettling shift in the atmosphere around them. Whispers and uneasy glances pass between the riders as an unseen presence draws closer in the confined space. The situation escalates when one traveler attempts to alert others, only to discover that help may not arrive in time. By the final stop, the women must decide how far they will go to regain control of their journey.