Interlude: Renny and Long Tom are in
Doc's submarine Helldiver on their way to join him when the learn
that Pat Savage is also heading that way, against Doc's orders....
The sub captain will not reveal
anything to Doc beyond mention of a Ring of Fire. Realizing that a
method of creating volcanoes exists, Doc and Johnny dive down to the
sunken sub in search of answers....
Pat Savage, en route to the Pacific,
has a dream where she and Amelia Earhart are flying over a volcano
and huge glowing figure rises from the lava to greet them....
Doc and Johnny discover a supersonic
wave generator—that Doc himself had invented—but tampering with
it causes a bomb to explode, Doc and Johnny barely making it to
safety. Doc now knows they are facing his greatest enemy....
Pat's plane is brought down on Phoenix
Island by some mysterious means and she is brought before the
criminal mastermind John Sunlight....