James Harg and his father work in a steelmaking plant which is incompetently run, with scant attention being paid to worker safety. In his own time, Harg works on ideas for a revolutionary new manufacturing process for hard steel. When his father is badly injured in a workplace accident resulting from employer negligence, Harg uses some of the compensation payment to develop his invention to a stage where it can be tested in practice. It is a huge success and Harg patents his process. He rises to a position on the board of the company, before staging a coup to oust his former employer and take over the business himself.
John Stuart
as James 'Iron' Harg
Benita Hume
as Audrey Paxton
Franklin Dyall
as Charles Paxton
Heather Angel
as Ann Ford
Alexander Field
as Sweepy Ford
Sydney Benson
as Lodger
Mary Merrall
as Mrs. Harg
Edward Ashley
as Sylvano
