Lyra and Will find themselves in a strange new place. The Magisterium take action as Mrs Coulter interrogates a suspected heretic witch, and Lee Scoresby embarks on a mission.

Lyra crosses into Will's world, and they set off to find answers about Dust. Will is shocked to discover he has grandparents, but quickly realises he can’t trust them.

Will and Lyra plan to steal the alethiometer from Boreal but are set back by an unforeseen guest. MacPhail takes decisive action, and Mary takes a leap of faith.