It is harvest time at Lark Rise and all the families are working in the fields. However, a measles epidemic sweeps through the county and as the mothers must stay at home to look after the sick children, the harvest is in danger of being so delayed that it cannot be saved. Daniel, come to tell Laura that he is leaving to work in Cambridge, deliberately gives up his new job to stay on and organize isolation and to rally the people of Candleford to come to Lark Rise to act as field workers and nurses.
—don @ minifie-1