Alex and his friends from Artime are stranded on a newly-discovered island, and they are not alone, while in Quill, his twin Aaron's power base grows as he joins with an unlikely ally in a risky plan to finally conquer Artime.

Fenton Hardy requests his sons, Frank and Joe, to help him solve a case of stolen gold in Montana. The gang who stole the gold attempts to thwart their train ride from their home in Bayport on Barmet Bay on the Atlantic coast to Lucky Bottom, Montana. After finally arriving, the boys face more trouble with the gang as well as a mine shaft cave-in, a Rocky Mountain Blizzard, a pack of wolves, and finally Black Pepper, the leader of the gang. On top...