Danger hits close to home when a cobra is found in Mma Ramotswe's office. Of less immediate danger, but greater general interest, are the faulty blood pressure measurements being recorded at the local clinic. But perhaps the biggest mystery is why Mma Makutsi's fiancé has missed their usual dinner date. Is he discontented? And if so, will cramming her feet into a pair of fashionable blue shoes help Mma Makutsi find happiness?