Terence Morgan has a bit of a glint in his eye here as "Johnny", a bit of an opportunist who finds himself embroiled in a plot to abduct a professor (Esmond Knight) and pinch his formula for hardened steel that could revolutionise production and durability. Together with his charming - and quite wily - girlfriend "Doreen" (Joan Rice) they have to thwart these would be thieves and save the boffin wver mais...