When Thomas Alder and Rachel uncover a hidden network of ancient tunnels beneath Hollow Ridge, they discover a forgotten chamber built to guard a mysterious prison deep under the valley. With the help of Daniel Mercer, they learn Rachel’s grandfather sacrificed himself years earlier to stop the prison from breaking open and releasing whatever lies inside. As the ancient seal begins to crack, the three must restore the mechanism and embrace their role as the valley’s new guardians before the buried force awakens.
