Two years after the events of His Dark Materials, Lyra and her daemon Pantalaimon sit high on the roof of Jordan College, gazing down on the streets of Oxford. But their peace is shattered by a flock of enraged starlings, who seem intent on knocking another bird out of the sky - a bird that Lyra and Pan quickly realise is a witch's daemon. The daemon carries worrying tidings of a terrible sickness spreading in the north, and claims that only Lyra can help him - but is he really friend, or foe?