Dr. Lewis Shaler and his son Max are traveling by<br />train to London. Lewis will leave Max to attend the<br />funeral for victims of a great accident at the<br />hospital where he works. When Max accidentally<br />spills coffee on Sarah Barwell, Lewis offers to pay<br />for the cleaning, and soon they start a talking.<br />When the train stops, Lewis sees a man on the<br />track apparently fixing the brakes. When the<br />moves, he sees another man crawling on<br />tracks. Lewis seeks out the train conducto<br />finds he's missing. When the train bypasse<br />stop, he tries to contact the driver. After talking<br />with the few passengers onboard, they realise the<br />train has no brake and the driver's suicidal.
