Girl Wrapped in Branches

A skeleton is found entombed in a hundred-year-old tree, then another, fresher body in a much younger tree.
Is it a century-old killer? Or a family of murderers who've passed their grisly trade down through the generations?
Brilliant FBI Agent Ella Porter, currently banished to the small town of Nome, discovers a woman's remains in an ancient tree and the clues bring her to a small, secluded lake town in the beautiful inland of Alaska. Meanwhile, a wraith from her past wants to forge an unlikely alliance, but some boundaries can't be uncrossed.
Aided by an unwanted informant, as well as her old friend, Brenner Gunn, Ella Porter sets out to solve her most harrowing case yet. Meanwhile, secrets from her past are being unearthed, and threats are closing in.