Sixteen-year-old Glenn Morgan has lived next to the Rift her entire life and has no idea of what might be on the other side of it. Glenn's only friend, Kevin, insists the fence holds back a world of monsters and witchcraft, but magic isn't for Glenn. She has enough problems with reality: Glenn's mother disappeared when she was six, and soon after, she lost her scientist father to his all-consuming work on his mysterious Project. Glenn buries herself in her studies and dreams about the day she can escape to the cold isolation of a research station on 813, a planet on the far side of the known universe. But when her father's work leads to his arrest, he gives Glenn a simple metal bracelet that will send Glenn and Kevin on the run, with only one place to go. The other side of the Rift will bring truths about what really happened to Glenn's mother, and will put them at the center of an age-old struggle between two halves of a divided world.