Anna questions the official explanation when the death of a fellow ranger unsettles the park.

As Anna settles into a more complicated personal life in the park, she discovers a game of hide-and-seek has taken a turn; intent on helping a family in crisis, Anna and the 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.

The rangers are tested by the difficult investigation into Anna's disappearance.

A naked, glowing man with no memory leads Anna and Frederick to unravel a decades-old mystery.

The discovery of a body in the river draws Anna into the complicated world of a celebrated artist.

A shooting hits close to home as Molly visits to find Anna's life more complicated than it seems.

With winter settling over the deserted park, Anna must answer a dangerous SOS call alone.