The teenage girl hurried along the darkening street, head down in a vain attempt to divert attention from herself as she headed for her bus stop, still over a block away. The car behind her was a soft growl in the still, warm air. The day was fast fading, the sky a light mauve, only a sprinkling of stars yet. Soon it would be dark... Ignore them, she told herself. But it was impossible to do with the car following so close that the heat from the motor brushed her bare legs, like a monster's breath.