Vigilia's Tempest

After tracing Ariel Angelucci through Ireland, Rome, Como, and Munich, Vigilia finally finds him in Switzerland. Angelucci reveals that he did indeed fly with Lindbergh. Not sure if he believes the story, John takes the man for a flight in a biplane to discover if he really knows how to fly. The old man wants to perform some stunts, but suffers a heart attack at the top of a loop, jamming the controls and causing the aircraft to crash.

When John Vigilia regains consciousness in a private clinic on an island in Lago Maggiore, he realizes he is being kept prisoner because of what he knows.