Mr. Campbell invites Sally and her family to stay in his sister's home in the country. Unfortunately Sally is her error-prone self, and when Peter falls in the river at the start of their mini holiday and the household has a disturbed night, Miss Campbell starts doubting her own sanity.

Having tested Mr. Campbell's patience a final time, Sally joins the ranks of the unemployed. Fearing her skills are limited - shorthand that can't be read back, an essay on volcanoes and night classes in fruit bottling - she tries a position at the boys' school, but is soon back on the job hunt. Will anything suit?