18 Fatal Strikes (1980)

After an Abbot Monk is injured and taken into the home of two young men, they find themselves targets of the Ching Army and its evil leader Wong Wu Ti. Wong is set out to destroy the underground rebels but once they hurt the sexy Mrs. Sheng the two friends (played by Tung Wei and Shih Tien)seek revenge after learning kung-fu from their new guest the infamous monk, Wen Hung.