The theme of Flinch is that movie audiences have a need to be entertained. If they're not, any other purpose the writer or producer has is wasted. Flinch is a comedy that is influenced by its audience.

Arthur Verde, dyed green, wrestles as the Green Giant. He admires Gawain, a proud undefeated boxer, and asks to be introduced to him. Verde's expected pleasant meeting deteriorates under a series of insults from Gawain. They decide on an exchange of blows. Gawain does little damage with his punch and agrees to let the wrestler have his turn on his home turf, a bar he owns.

Life gets complicated for the boxer when the sexy barmaid he romances at Verde's place turns out to be the wrestler's wife. The upcoming punch, postponed several times, looms ever larger with a potential for death or disfigurement.

The story is loosely based on the 15th Century narrative poem, Sir Gawain and The Green Knight with knights of the squared circle taking the place of those of the Round Table; bar flies replacing ladies in waiting; an Hispanic singer who wants to do country music in place of the court troubadour; and fight managers substituting practical decisions for the ideals exemplified by King Arthur's Court.