In October 1924, Andrew Manson, an idealistic, newly qualified doctor, arrives from Scotland to work as assistant to Doctor Page in the small (fictitious) Welsh mining town of Drineffy (Blaenelly is the name given in some adaptations). He quickly realises that Page is unwell and disabled and that he has to do all the work for a meagre wage. Shocked by the unsanitary conditions he discovers, Manson works to improve matters and receives the support of Dr Philip Denny, a cynical semi-alcoholic who, Manson finds out in due course, took a post as an assistant doctor after having fallen from grace as a surgeon. Resigning, he obtains a post as assistant in a miners' medical aid scheme in 'Aberalaw', a neighbouring coal mining town in the South Wales coalfield. On the strength of this job, Manson marries Christine Barlow, a junior school teacher.