Bree and Samson discover a crying infant in the snowy Rock Harbor forest. But where are the baby's parents? And how did she get there?

A mysterious sound leads search-and-rescue worker Bree Matthews and her dog, Samson, to an abandoned baby in the woods outside Rock Harbor, Michigan. Bree takes the baby girl in and begins to search for the mother - presumably the woman reported missing just days earlier.

While teams scour the wintery forests, Bree ferrets out clues about the woman. Where is she, and why did she leave the child behind? And how does that connect to Bree's first husband's mysterious death years ago in the Upper Peninsula? Everything Bree thought she knew about her life changes with the sound of a cry in the night.