Sylvia Yule, the heroine of Moods, is a passionate tomboy who yearns for adventure.  The novel opens as she embarks on a river camping trip with her brother and his two friends, both of whom fall in love with her. These rival suitors, close friends, are modeled on Ralph Waldo Emerson and Henry Daniel Thoreau. Aroused, but still "moody" and inexperienced, Sylvia marries the wrong man. In the rest of the novel, Alcott attempts to resolve the dilemma she has created and leave her readers asking whether, in fact, there is a place for a woman such as Sylvia in a man's world.