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.

Lyra and Will find allies who can help them in their search for Will’s father. The Magisterium learn something shocking, and Mrs Coulter meets a formidable foe.

Lyra and Will seek help from Iorek to fix the Subtle Knife before reaching an agreement to go to the Land of the Dead together. Mrs Coulter goes on trial in Asriel’s republic.