Hidden deep in the mountains is a Crystal that gives unimaginable power to anyone who possesses it. The Covenant has one last chance to find the artifact before it falls into the hands of the bloodthirsty gorillas and their sinister Lord. However, when Carter leads the Snow Bears to the ape-infested lands to retrieve the Crystal, they discover that they have been betrayed. However, it is too late, as the heroes fall straight into a trap. The crystal is now heading towards the Evil One and only Kerri can save Carter and the Bears. Only she can stop the Evil One before he uses the power of the Crystal to destroy the world. The Alliance gathers all its strength for the final showdown in this breathtaking Twilight chapter of the Age.