Jean Valjean, wrongfully imprisoned for nineteen years for the petty crime of stealing bread, finds himself released thanks to Mrs. Herberst, his devoted wife. Upon his release, he encounters a harsh world where no one is willing to provide shelter to a former convict. Fortunately, Bishop Myriel offers Valjean refuge in his home. Valjean expresses his hope that resting in a real bed can transform him into a new man. However, in the dead of night, an overwhelmed Valjean, tempted by the Bishop's silverware, attempts to steal it but is caught. Unexpectedly, when the police apprehend him and bring him back to the Bishop, Myriel surprises everyone by claiming that the silver was a gift, encouraging Valjean to embrace his chance for redemption. "You are to become a new man," he insists to Valjean.
Fast forward nine years, and Valjean has succeeded, becoming a prosperous industrialist and mayor. Meanwhile, Fantine, a struggling single mother, faces dismissal from one of Valjean's factories after her supervisor discovers her out-of-wedlock daughter. Overcome by desperation to support her daughter Cosette, Fantine is pushed into a life of prostitution. Unbeknownst to her, the relentless Inspector Javert, who once monitored Valjean during his imprisonment, is on the trail of the mayor, suspecting a connection between Valjean and the supposed criminal.
After a harrowing series of events, including an incident where Fantine is attacked and subsequently arrested by Javert, Valjean intervenes, utilizing his authority as mayor to secure her release. In her moment of need, Valjean becomes her savior, nursing Fantine back to health and promising to help reunite her with Cosette. Yet, the devious Thénardiers, who are supposed to care for Cosette, continue to extort money under the guise of the girl's illness, causing further anguish to both Valjean and Fantine.
When Valjean learns of a man being misidentified as himself, he rushes to court to protect his identity and clear the confusion, revealing himself to be the true Valjean. Tragedy strikes shortly after as he finds Fantine gravely ill. She implores him to look after her daughter, and despite Javert's arrival to arrest them both, she tragically dies before his eyes. Grieving and enraged, Valjean confronts Javert, knocking him out and fleeing with a heavy heart.
In a courageous act, Valjean locates and rescues Cosette from the ruthless Thénardiers, who have treated her as little more than a servant, even suggesting her to clients in a shameless act of exploitation. Together, Valjean and Cosette start anew in Paris, seeking sanctuary within a convent where they can live a life free from fear.
A decade later, upon leaving the convent, Cosette, now a young woman of nineteen, finds herself deeply in love with a revolutionary named Marius. Meanwhile, Javert clandestinely infiltrates Marius's organization, dedicated to dismantling the very group Cosette loves. In a gripping twist, Javert is captured during a barricade-standoff led by the rebels, and Marius holds him as a prisoner sentenced for execution.
Driven by love for Cosette, Valjean makes his way to the barricades, seeking to save Marius and persuade him to return to her. In a moment of chaos, the young Gavroche is tragically shot, prompting Valjean to use his influence to claim Javert, intending to seek his revenge. However, in a surprising turn, Valjean chooses mercy over vengeance and releases Javert instead.
Valjean's journey takes another drastic turn as Marius is injured, prompting Valjean to save him by transporting him through the sewer to safety. Javert, despite his efforts to capture Valjean, ultimately agrees to let Marius live. Back at Valjean’s residence, the reality of his duality weighs heavily on Javert, who is torn between his duty and the profound compassion Valjean has exhibited.
In the end, woven with the theme of mercy, Javert declares, "It's a pity the rules don't allow me to be merciful," and ultimately takes his own life, unable to reconcile his beliefs with the humanity he witnessed in Valjean. As Valjean walks through the streets, smiling at last as a free man, he embraces the chance to find peace and redemption.
