Lionheart is a 1990 Jean-Claude Van Damme beat-people-up movie. The film is entirely indicative of Van Damme's career; the script could have been written by pattern recognition software.
Van Damme is Lyon Gaultier, a soldier in the French foreign legion fighting somewhere in Africa. (Van Damme, a Belgian, usually plays American characters.) One day, JCVD learns that his brother in the United States is sick, leaving no one to care for his wife or small child. Feeling a sense of duty, Van Damme goes AWOL and goes to America.
With the French military police hot on his tail, JCVD finds his sister in law, who has never met him before and is rather freaked out. She is also obviously poor, and since JCVD is a badass karate stud, he joins the underground brawling circuit to make some cash.
Obviously, Van Damme kicks some ass at these events. (The spectators of these fights are incredibly rich and evidently have nothing better to do with their time.) The most memorable of these brawls occurs in a darkened warehouse in which JCVD and a kilt-wearing Scotsman fight in a circle surrounded by Mercedes and other luxury cars. The cars all honk and flash their brights after memorable blows.
JCVD has money now, but his sister-in-law (for good reason) thinks he's a psycho, so he resorts to stuffing her mailbox with Benjamins. Eventually, her trust is bought and they reconcile.
Problems come for Van Damme, however, when his rich-girl sponsor on the brawl circuit decides to sell him short. She matches him against a super-tough guy who says few words and menacingly pets a cat. To make matters worse, an injury to JCVD's abdomen flares up right before the big match.
When the bout begins, JCVD gets punched a lot. After a vicious blow, he crawls to a side of the ring (actually, a tennis court) where his friend Joshua (Harrison Page) is, beginning the only memorable dialogue sequence of the movie:
Joshua: Don't worry! I bet against you! We're set!
JCVD: Wrong bet! (Begins beating up his opponent)
OK, so it wasn't that memorable. There wasn't much to work with here.
Outside the U.S., the movie was titled "Wrong Bet."