In the icy realms of the far North, where witch clans soar and armored bears rule, young Lyra races against time.

The mysterious Gobblers are stealing children—including her best friend, Roger—and vanishing into the shadows. Meanwhile, her formidable uncle Asriel seeks to build a bridge to a parallel world, a quest fraught with peril.

Lyra is a savage, a schemer, a liar, and a fierce champion. But as she navigates this treacherous landscape, she faces an impossible choice: to help one is to betray the other.

Can one small girl make a difference in such great and terrible endeavors? The fate of more than one world may rest in her hands.