This is quite an enjoyable little crime thriller with a bit more to it than usual for these types of low-budget affairs. When a man is knifed to death on a train, he manages to smuggle his secret papers into the trunk of unwitting, fellow passenger "Barbara" (Jenny Laird) and the race is on between the police and the murderers to track down these vital blueprints. Lawrence Huntingdon manages to create quite a bit of tension and suspense with a pretty basic story; John Warwick and Aubrey Pollock are good as the gents trying to help save the lady and rescue the plans, as are Paul Neville and Ivan Wilmot as their dastardly competitors. Not a film that you will come across very often, but if you do then it's worth a gander.