On this day, a simple promise is made in the heart of the woods, but what unfolds next is RJ the Mouse's most perilous journey yet. Can he keep the promise he made to his little sister Cassidy with the darkening road ahead and an old evil waiting at the road's end?

Time fades memories, and RJ's journey takes him into the heart of forgotten lands and others in need of help. The uneasy calm that had long been at rest is now disturbed, and RJ finds himself in the center of it all.

All roads lead to a lonely king, but all is not what it seems. What other mysteries will be revealed, and can RJ fulfill the promises he's made?