Crooked tycoon Warren Grafton invites Jeff, Brains and Tin-Tin for a ride on the monorail he has built.
International con man Warren Grafton has aroused Jeff Tracy’s interest in a nationwide monorail system, but the interest is more the railroad’s safety than any money making potential. Jeff’s fears prove correct when a storm damages a bridge crossing a canyon… and nothing can stop the onrushing train!
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