Darcy's dad, a naturalist, moves their family from England to the snowy wilderness of Yellowstone National Park. Mum, Dad, and older brother Jem are all thriving, but Darcy misses her friends, and civilization, including WiFi. She's also sick, getting weaker with each day, and having strange dreams--or are they something else?
Then she finds an injured mother bear whose cubs were killed by hunters. The bear is enormous, and powerful, but she doesn't threaten Darcy--she makes Darcy feel alive. The bear needs Darcy just as much as Darcy needs her. Darcy must help her, even though she might not be well enough to take care of the bear, let alone herself.
A mystery illness, shifting points of view, and dreamlike sequences make this an unusual and immersive story. Darcy is brave and resourceful, but nothing has prepared her to confront nature's ultimate question: Can a girl and a wild bear triumph over the basic rule of survival: kill or be killed?