The play is about an old engine driver who thinks his engine is malevolent and self-aware. The finale is a huge train wreck using elaborate stage special-effects as per The Ghost Train, an earlier play by Ridley.
This theatrical piece centers on an aged railway driver who suspects that his engine has developed a malignant and conscious nature. The finale culminates in a spectacular train disaster, replete with intricate stage special effects, inspired by Ridley's prior production, The Ghost Train.