Jake Blues, John Belushi, a blues vocalist and petty criminal, leaves Joliet Prison after serving three years of a five-year sentence for armed robbery, and is picked up by his brother, Elwood Blues, in a battered former police car. Elwood’s unapologetic swagger and a few high-stakes demonstrations of the car’s capabilities reveal the duo’s reckless charm, as they head toward the Catholic orphanage where they were raised. There, Sister Mary Stigmata, played by Kathleen Freeman, informs them that the orphanage will close unless it can scrape together $5,000 in overdue property taxes. On the spur of a sudden inspiration, and at the urging of their friend Curtis, the brothers hatch a plan to reform their long-dormant band, the Blues Brothers, and use the upcoming mission to raise the money needed to save the home that shaped their youth.
That night, trouble follows them in the form of state troopers chasing Elwood for a suspended license—an obsession fueled by an avalanche of tickets and violations. The brothers slip away in a high-stakes car chase that roams from Joliet backstreets to a tense Dixie Square Mall moment, only to be interrupted by a mysterious woman firing a rocket launcher at their car. The next morning, as police descend on their flophouse, the same explosive visitor detonates the building, annihilating it in a blaze of fire and debris, yet leaving Jake and Elwood miraculously unscathed and still one step ahead of the law.
Determined to reassemble their band, the brothers set out to recruit the missing players. They discover five of their former members performing as “Murph and the Magic Tones” at a deserted Holiday Inn lounge and swiftly coax them back into action. The trumpeter known as Mr. Fabulous, portrayed by Alan Rubin, initially refuses, but softens after a playful display of social savviness and a little musical bribery. En route to secure the final two musicians, the road is blocked by a march from an American Nazi Party contingent on a bridge, and Elwood shoves the crowd into the East Lagoon, drawing harsh graffiti from their attackers and earning a vow of vengeance from the neo-Nazis led by the Head Nazi. The crew also tracks down Matt “Guitar” Murphy, who now runs a soul-food spot with his wife and a man known as “Blue Lou” Marini; their reunion is coaxed by a blend of cajoling and hunger, and they soon join the cause. The band’s appetite for gear leads them to Ray’s Music Exchange in Calumet City, where Ray Charles—portrayed in the film—adds a future IOU to the mix, sealing the deal for crucial instruments and amps.
A key obstacle emerges when Jake’s mysterious ex-fiancée continues to stalk him, blasting his telephone booth with a volley of bullets that somehow misses him again and again. Undeterred, the Blues Brothers land a gig at Bob’s Country Bunker in Kokomo, Indiana, where they impersonate the booked act and win the crowd over—at the cost of a mounting bar tab and the wrath of the real band, the Good Ole Boys. The plan accelerates toward a grand, money-raising finale: a blazing, all-out show at the Palace Hotel Ballroom just north of Chicago. The event promises a $10,000 cash advance on a recording contract and, crucially, a path to paying off the orphanage taxes and Ray’s IOU. As they perform two raucous numbers, the ex-fiancée’s bullets finally force a dramatic, if improbable, exit from the building, and she briefly rekindles interest in Jake before letting them go.
With the funds secured, the duo race back toward Chicago, pursued by a sprawling convoy of state and local police, the Good Ole Boys, and the neo-Nazi faction. Their escape relies on a string of near-miraculous maneuvers, including a gravity-defying getaway from the Nazis, before they burst into Cook County Hall to settle the tax debt. They pay the overdue taxes in the assessor’s office, Steven Spielberg among the witnesses and fans, and are promptly arrested by the overwhelming contingent of law enforcement waiting to seize them. In a closing twist, the Blues Brothers end up back in the prison yard, where they deliver a rousing performance of “Jailhouse Rock” for their fellow inmates, sealing their fate with a final chorus that feels earned, chaotic, and unapologetically alive.