Anna questions the official explanation when the death of a fellow ranger unsettles the park.
As Anna Pigeon settles into a more complicated personal life in the park, she discovers a game of hide and seek has taken a dangerous turn; intent on helping a family in crisis, Anna and the other rangers must make a decision that will affect the family's future.
Anna guides a tense group of campers through the backcountry as a fierce storm closes in.
An explosion at the park draws Anna into a case beyond its borders.
