The adventures of 11-year-old Flavia de Luce, who is both an amateur detective and a master poisoner. When she discovers a dead body in her family’s decaying British manor house and her father is accused of the murder, Flavia launches her own investigation to uncover family secrets and bring the true murderer to justice.

Ever since he was expelled for his treatment of a classmate with a facial deformity, Julian has struggled to fit in at his new school. To transform his life, Julian's grandmother finally reveals her own story of courage of her youth in Nazi-occupied France, where a classmate shelters her from mortal danger.