Susan and Brian are returning home late with Susan's parents, Angie and Peter. Unable to catch a taxi, they descend onto the platform of an Underground station, desrted but for Liz, a teenage runaway. As they await a delayed train, their bickering and idle chat begind to reveal family secrets, and strange and unsettling things happen. Soinds of drums rumble from the tunnel, footsteps echo in the passageways, shadows alive with malice appear. To top it all, Liz has designs of her own. Soon, a connection between the ghostly phenomena of the present and the poignant events of the past becomes obvious.3 women, 2 men.