The commentary doubles as a synopsis, and is reproduced below:

On the lonely Argyll coast of Scotland lies the derelict Machrihanish colliery. Now, after twenty years, a reconstruction scheme is under way.

Two drift mines are being driven. One is already about 1500 feet in, the other 800 feet. Working of the 17-foot seam will be by the most up to date machinery, and there will be a conveyor right to the surface. At present, there are only fifty men working. There will be five hundred.

Machrihanish Colliery, now 150 years old, will be reborn with a target of 1,500 tons of coal a day, and an output at the coalface of 8 tons per man shift.