Series 1 follows Lyra, a seemingly ordinary but brave young girl from another world. Her search for a kidnapped friend uncovers an evil plot.

Series 2 begins after Lord Asriel has opened a bridge to a new world, and, distraught over the death of her best friend, Lyra follows Asriel into the unknown. In a strange and mysterious abandoned city she meets Will, a boy from our world who is also running from a troubled past. Mrs. Coulter searches for Lyra, determined to bring her home by any means necessary.

In the final chapter, Lyra, the prophesied child, and Will, the bearer of The Subtle Knife, must journey to a dark place from which no one has ever returned. As her father’s great war against the Authority edges closer, they will learn that saving the worlds comes at a terrible price.