Anna questions the official explanation when the passing 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.

An explosion at the park draws Anna into a case beyond its borders.

Anna guides a tense group of campers through the backcountry as a fierce storm closes in.

Anna fights for survival while her friends race to uncover what happened to her.