Professor Hasdane (Tony Quinn) is an absent minded inventor who works for the Ministry of Defense. He's developed a bomb housed within a pen. A bomb that is set off by the sound of bells. On his way home from a demonstration he manages to leave a suitcase in a taxi which is found by cheeky cockney wideboy Sammy (Harry Fowler). Unfortunately the suitcase has a live pen bomb in it. Sammy offloads the case to a fence, before he's approached by the professor who is trying to find the case. Sammy tries to help the prof to find it once he learns there's a reward, but in the sort of co-incidence that only happens in films, Sammy's employer is Hunter (Sydney Tafler) a dodgy club owner and who sells drugs which are hidden inside pens! No chance of a mix up happening there then is there? A likable little film that is carried by the charm of the comical Harry Fowler as he pursues the pen through a variety of bizarre circumstances.
