Your bus is taking ages to arrive and it has started to rain gently. The pavements are glistening in the streetlights' glow and the smell of cooling tarmac rises off the roads. A strange feeling comes over you and you shiver, and the chill that is seeping into your bones is nothing to do with the fine film of rain on your skin. A low voice sounds from behind you and you turn around quickly at its sound. "Help me," the person says, his eyes dark and his voice trembling. "I need to escape."