The novel takes place entirely in the environs of Egdon Heath, and, with the exception of the epilogue, Aftercourses, covers exactly a year and a day. The narrative begins on the evening of Guy Fawkes Night as Diggory Venn is slowly crossing the heath with his van, which is being drawn by ponies. In his van is a passenger. When darkness falls, the country folk light bonfires on the surrounding hills, emphasising the pagan spirit of the heath and its denizens.
Venn is a reddleman; he travels the country supplying farmers with a red mineral called reddle (dialect term for red ochre) that farmers use to mark their sheep. Although his trade has stained him red from head to foot, underneath his devilish colouring he is a handsome, shrewd, well-meaning young man. His passenger is a young woman named Thomasin Yeobright, whom Venn is taking home. Earlier that day, Thomasin had planned to marry Damon Wildeve, a local innkeeper known for his fickleness; however, an inconsistency in the marriage licence delayed the marriage. Thomasin, in distress, ran after the reddleman's van and asked him to take her home. Venn himself is in love with Thomasin, and unsuccessfully wooed her two years before. Now, although he believes Wildeve is unworthy of her love, he is so devoted to her that he is willing to help her secure the man of her choice.
At length, Venn reaches Bloom's End, the home of Thomasin's aunt, Mrs. Yeobright. She is a good woman, if somewhat proud and inflexible, and she wants the best for Thomasin. In former months she opposed her niece's choice of husband, and publicly forbade the banns; now, since Thomasin has compromised herself by leaving town with Wildeve and returning unmarried, the best outcome Mrs. Yeobright can envision is for the postponed marriage to be duly solemnised as soon as possible. She and Venn both begin working on Wildeve to make sure he keeps his promise to Thomasin.
