WWII looms, China fears German/Japanese invasion. Espionage group hires Bruce Le to retrieve secret document from 6-floor tower's top level by fighting his way up.

World War 2 is approaching, and China is suspecting an invasion from Germany and Japan. Mr. Chang Bruce Le is hired by a Chinese espionage group to recover a secret document - crucial in winning victory - hidden on the top floor of a 6-storey building, and to do so, must fight his way up the tower and get to the last floor.—J. R.