Arabella is a young lady who has lived for a long while at her father’s secluded country home. She spends her time reading romances (in 18th century Britain, "romance" meant fictional works posing as historical accounts of tragic heroines, leibestods, and undying affection--usually French in origin).

She has come to believe the romances to be true and models her behavior after the rigid rules of womanhood contained in them. Moreover, she interprets others’ action or outside events according to romantic expectations.

When Arabella finally goes into society, all are struck with her wisdom and beauty, but are baffled by her behavior and constant references to various romantic characters. She scorns her persistent suitor, Mr. Glanville, since he does not, at first, pursue her according to the rules of romance. He neither pines away, nor allows her to send him to the far ends of the earth to think of her without hope, forever. He soon learns to humor her caprices.

Arabella goes through many adventures all of which depend on her obsession. When she falls ill after diving into a river to save her honor, a doctor is called in to treat her. Learning of her obsession, he resolves to cure her. Using cold logic, he dissolves Arabella’s misconceptions.