As a child, Arden Ward was trained by Guardians to help keep people who wished to harm the forest, out, and to keep herself a secret. After her father died, it was her responsibility as the only one in her family strong enough, to protect the Tree and her family at all costs. But when a man is sent to her house and kills her family, that plan is thrown out the window. In the midst of her sorrow, she runs to the one place she was told to stay away from. The Tree of Life. After essentially saving the life of the Forest Pack's alpha female by taking an arrow in her chest, her soul is deemed worthy and the Sentinel wrapped around the tree breathed his power into her, creating the next Sentinel. Years later, after being raised by the Pack and gaining full control and understanding of her powers, a war has broke out. And it is heading straight for her forest. Will she fulfill her duty as Sentinel and protect the Tree and Pack? Or will she fail and watch as the forest burns around her?