In this chapter, the narrative centers on Clara Sessemon, a young girl whose "legs were weak" and who spends her days in the study, a room filled with a "handsome bookcase" that highlights her academic life. Her quiet existence is interrupted when Dete arrives with a young girl named Heidi. The introduction of Heidi serves as a catalyst for tension, as the housekeeper, Mrs. Rottenmeier, had specifically requested a companion for Clara who was of a similar age and educational background.
Mrs. Rottenmeier’s immediate reaction to Heidi is one of profound disappointment and shock. Expecting a twelve-year-old peer for Clara, she is dismayed to learn that Heidi is significantly younger. When confronted about the child's age, Dete attempts to "hide the truth," claiming Heidi is about ten. However, Heidi’s innocence shines through when she honestly reveals, "Grandfather told me I was eight."
The situation escalates when Mrs. Rottenmeier discovers that Heidi has "never learned to read." The housekeeper’s frustration is palpable as she exclaims, "Mercy!" and questions how Dete could bring such a child. Despite Dete’s insistence that Heidi is a "sweet girl" and a perfect companion, the housekeeper is left in a state of agitation, unable to even catch Dete to voice her full grievances before the woman departs.
While the adults struggle with the logistics of the arrangement, a natural connection begins to form between the two girls. Heidi, remaining "behind the door," is approached by Clara. Their conversation is marked by innocence and curiosity. Heidi, despite being "sent here to live" with Clara, maintains her own agenda, telling Clara, "I think I will take her [Grandmother] a loaf of white bread."
Clara finds Heidi’s perspective refreshing, laughing and noting, "You're a funny child." While Clara recognizes the absurdity of the situation—given that she was expecting a peer to "share school lessons"—she remains optimistic, believing that her tutor will "like teaching" Heidi. This moment highlights the contrast between Clara’s structured world and Heidi’s unrefined, simple nature.
As the evening progresses, Mrs. Rottenmeier attempts to assert control over the household and its newest resident. During dinner, she reprimands Heidi for speaking to the butler, Sebastian, telling her, "you are not to speak to any of the help unless you have an order for them." She subjects Heidi to a stern "list of rules," grabbing the girl's chin to force her attention.
However, Heidi’s exhaustion from an early start and a "long trip" overrides the housekeeper's severity. As Mrs. Rottenmeier drones on, Heidi falls fast asleep. Clara, witnessing this, finds a rare moment of joy, noting with a "huge smile" that she couldn't remember when she had "had so much fun at dinner time." This closing scene underscores the potential for Heidi to bring life and warmth into the otherwise rigid and controlled environment of the Sessemon household.