The alethiometer sends Lyra and Iorek on a new path, leading to a shocking but vital clue in her search to find her friend Roger and the other missing children.

Separated from her friends, Lyra must use all of her methods of deception to thwart a formidable foe. Meanwhile, Mrs Coulter plots her next move.

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.