Johnny Walker, a student at fictitious Ashcroft High School, is the top high school quarterback prospect in the nation, and is being heavily recruited by many schools. His best friend, Leo Wiggins, thinks he should hold out for the best offer while his girlfriend, Georgia, wants him to go to State University with her and get a solid education. The various colleges offer him everything he could possibly want — hot girls, cars, cash, free room and board, etc. One school even buys Leo a car, while another offers to provide him with male companions if he isn't interested in women. His coach, Wayne Hisler, even tries to sell him out by striking a deal with one of the interested colleges to become their next head coach, if he signs their scholarship offer. Although he has all the skills a coach would want in a quarterback, Johnny is unsure where he wants to go. Being tempted by the offers, praise, and attention, his ability to make good decisions is blurred. Johnny begins to get a "big head", which irritates his family. After he returns home dressed in a gaudy outfit, his mother reminds him not to forget about what's important. Johnny visits State University, and asks the head coach what he can do for him in order to convince Johnny to sign with State. The coach tells Johnny he will give him a scholarship, a good education, and a chance to earn the starting QB job, and that's all he'll give him. He tells Johnny that he is headed for a lot of trouble if he signs with the colleges that are giving him gifts and money, which is a violation of NCAA rules. Johnny dismisses him out-of-hand. Later that night, Johnny and Leo end up in a motel room with three girls. Chief Elkans, the local sheriff, then turns up after the girls falsely accuse them of rape. Coach Hisler visits the two in the local jail, and tells Johnny that either he can sign with Piermont University, the college Hisler was hired at, so they can both prosper, or he can end up in prison on the fake charges for a long time, which would jeopardize Johnny's career. While sitting in jail, Johnny discovers that Leo had something to do with his predicament, and is disappointed in him. Nevertheless, Johnny forgives Leo. On Signing Day, the entire world watches his press conference with anticipation. Coach Hisler then calls the other four top prospects from Johnny's high school team up onto the stage with him and Johnny, where he announces that they will all be at Piermont that next school year, with Hisler as head coach, and Johnny as quarterback. When Johnny has a chance to speak, he states of the embarrassment and shame he has put on his family, friends and mostly himself, as he lost that edge. Johnny then decides that he would rather not play than to be treated special just for being able to throw a football, thus also choosing not to sign with Piermont or any schools. The Walker family and Georgia are pleased with Johnny's decision, but Hisler, refusing to accept this as fact, threatens him. When the other four players refuse to sign with Piermont as well, everyone begins to go crazy. Floyd Gondole, the NCAA recruitment investigator comes on stage, and announces that since day one he's been watching the recruitment of Johnny very closely. He then states several of the worst offending colleges will be under investigation for recruiting violations, including Ol' Tex & UCC, and Piermont, the latter who framed Johnny and Leo for rape. Afterwards, many of the other schools think they still have a chance to sign him, and beg him to reconsider them. The sports agent causes a huge melee, but Johnny walks away with Leo and Georgia. He is then seen running down a hallway to the office of an unknown Athletic Director. It turns out to be Ned Sanders, the head coach of State University, who accepts Johnny, and officially offers him a scholarship, after he says that he just wants a good education and a chance to play football. After signing with State, he drives off with Georgia and Leo. Over the credits, you see Johnny playing the drums while watching the collateral damage for all of the people caught in the recruitment scandal.
The film was a failure at the box office and for its star, Anthony Michael Hall. At review aggregator Rotten Tomatoes, as of April 2020, Johnny Be Good had a 0% rating, based on 15 reviews, with an average score of 2.33/10. On Metacritic the film has a weighted average score of 10 out of 100, based on 8 critics, indicating "Overwhelming dislike".