Emma Woodhouse has just attended the wedding of Miss Taylor, her best friend and former governess, to Mr Weston. Having introduced them, Emma takes credit for their marriage, and decides that she rather likes matchmaking. She returns home to Hartfield with her father, who misses Miss Taylor equally with his daughter. Against the advice of Mr Knightley, Emma forges ahead with her new interest, and tries to match her new friend Harriet Smith to Mr Elton, the local vicar. Emma is convinced that Mr Elton's attentions are a result of his attraction for Harriet. First, Emma must persuade Harriet to refuse the marriage proposal from Robert Martin, a respectable, educated, and well-spoken young farmer. Emma decides he is not good enough. Against her own wishes, Harriet rejects Mr. Martin. Mr. Elton, a social climber, thinks Emma is in love with him and proposes to her after a Christmas visit to the Westons. Emma, shocked, tells Mr Elton that she had thought him attached to Harriet. Elton is outraged at this notion. After Emma rejects him, he leaves for a sojourn in Bath, and Harriet feels heartbroken. Emma feels dreadful about misleading Harriet. Mr Elton soon returns with a pretentious, nouveau-riche wife, as Mr Knightley expected.
Frank Churchill, Mr. Weston's son, promises to visit his father soon. Frank usually lives with the Churchills, the brother of his late mother and his wife. Frank and Emma have never met. When he arrives for a two-weeks visit, he makes many friends. Mr Knightley suggests to Emma that while Frank is clever and engaging, he is also a shallow character. Jane Fairfax comes home to see her aunt, Miss Bates, and grandmother, Mrs Bates, for a few months, before she must go out on her own as a governess. She is the same age as Emma, but Emma has not been as friendly with her as she might. Emma envies Jane's talent. At age nine, Jane joined the family of Colonel Campbell, a friend of her late father, where she became fast friends with his daughter and received her education. Miss Campbell has married Mr Dixon. Emma is annoyed to find all, including Mrs Weston and Mr Knightley, praising Jane. The patronising Mrs Elton takes Jane under her wing and announces that she will find her the ideal governess post before it is wanted. Emma begins to feel some sympathy for Jane's predicament.
Emma decides that Jane and Mr Dixon were mutually attracted, and that is why she has come home. She shares her suspicions with Frank, who met Jane and the Campbells at a vacation spot a year earlier, and he apparently agrees with her. Suspicions are further fueled when a piano, sent by an anonymous benefactor, arrives for Jane. Emma feels herself falling in love with Frank, but it does not last to his second visit. The Eltons treat Harriet badly, culminating with Mr Elton publicly snubbing Harriet at the ball given by the Westons in May. Mr Knightley, who had long refrained from dancing, gallantly steps in to dance with Harriet. The day after the ball, Frank brings Harriet to Hartfield, she having fainted after a rough encounter with local gypsies. Harriet is grateful, and Emma thinks this is love, not gratitude. Meanwhile, Mrs Weston wonders if Mr Knightley has taken a fancy to Jane. Emma dismisses that idea and as she does not want Mr Knightley to marry, because her nephew Henry must inherit Donwell, the Knightley property. When Mr Knightley mentions the links he sees between Jane and Frank, Emma denies them, relying on Frank's words. Frank appears to be courting Emma. They flirt and banter together openly. He arrives late to the gathering at Donwell in June, while Jane leaves early. The next day at Box Hill, a local beauty spot, Frank and Emma continue the banter. Emma insults Miss Bates at that outing.