Murliprasad Sharma, alias Munna Bhai Sanjay Dutt is a street-smart gangster who finds himself smitten with radio jockey Jahnvi, the host of a bright morning show. After his crew rigs a contest, Munna lands an interview on Jahnvi’s program to win her heart. To impress her, he improvises as a college professor who specializes in Gandhism, insisting that he lives by Mahatma Gandhi’s principles of truth and non-violence. Jahnvi invites Munna to give a lecture at the residents’ home known as the Second Innings House, a place filled with elderly men and women who want meaning and dignity in their later years. The setup is simple, but the path ahead is anything but.
To prepare, Munna spends five days in a library absorbing Gandhi’s ideas, hoping they’ll lend him credibility and romance in equal measure. On the fifth day, Munna begins to hear the voice of Gandhi, who speaks to him and acts as a sort of inner mentor. Munna’s loyal sidekick, Circuit, accompanies him to a psychiatrist, but Circuit stops the doctor from revealing to Munna that his celebrity fixation has blurred into mental exhaustion. Convinced that Gandhi is truly present, Munna delivers a surprisingly moving lecture and wins Jahnvi’s attention and admiration. The encounter reveals a softer side of Munna that contrasts with his rough exterior, casting a new light on what he’s willing to fight for.
The plot thickens when Lucky Singh, a ruthless businessman who runs Munna and Circuit through a network of “underworld” activities, learns about Munna’s feelings for Jahnvi and sees an opportunity. He offers to fund a Goa trip for the residents of the Second Innings House, hoping the change of scenery will stamp out any budding romance. During the trip, Munna attempts to propose to Jahnvi, but the excursion turns out to be a calculated ploy to take control of the house. What appears to be a simple crisscross of personal ambition and familial obligation becomes a tangled web: Lucky’s daughter Simran Dia Mirza is engaged to Sunny, the son of the powerful businessman Khurana Kulbhushan Kharbanda. Batuk Maharaj Saurabh Shukla, the astrologer who frames Khurana’s world, has already nudged Khurana toward a new arrangement by altering the perceived fortune through numerology, even convincing him to modify his own name by adding an extra “k.” In this scheme, the Second Innings House becomes a coveted stake in a larger plan, and the community inside it risks being crushed under the weight of prestige and superstition.
Khurana’s cautionary superstition about manglik status and the supposed misalignment of Simran’s fate with Sunny’s future intensifies the pressure. Lucky, desperate to protect the betrothal and the alliance, glosses over the truth by claiming a birth error—an illusion maintained to keep the arrangement intact. Munna, who has grown attached to the people of the house and to Jahnvi, decides to fight back with a Gandhian strategy rather than force. He co-hosts a radio show with Jahnvi where he helps ordinary listeners navigate everyday problems through unorthodox interpretations of Gandhi’s principles. The core demand is unconventional but powerful: listeners are asked to send flowers to Lucky as a symbol of healing from the “disease of dishonesty,” a playful but pointed nod to non-violent protest. The campaign gains momentum, and the pressure on Lucky to relinquish the house intensifies.
As the movement grows, Munna remains vulnerable and emotionally exposed. On Gandhi’s insistence, he finally writes a letter to Jahnvi confessing the truth about himself, a moment that could have sealed their distance. Heartbroken, Jahnvi leaves him and steps away from the radio show, though Munna refuses to give up the fight. Meanwhile, Lucky retaliates with a public-relations blow, staging a press conference that declares Munna mentally ill, backed by a psychiatrist who validates the claim. The legitimacy of Gandhi’s guidance in Munna’s mind wavers, and he contemplates fleeing the city with Circuit.
Yet Munna’s resolve hardens as he plans one last, decisive broadcast to reach Jahnvi, even if it means holding the studio hostage for a final opportunity to speak truth to power. In another strand, Simran runs away from her wedding after discovering her father’s deception. She finds herself in the taxi of Victor D’Souza Jimmy Shergill, a driver who had previously benefited from Munna’s radio advice. Victor connects Simran to Munna, and she explains the dilemma she faces: a marriage built on manipulation rather than love. Munna counsels her to return and tell the truth, and she ultimately makes her way back to the wedding. When Khurana rejects Simran, Munna and Circuit crash the ceremony and confront Batuk Maharaj, challenging the manipulative web that has kept the couple apart. Sunny, who still wishes to marry Simran, stands by his choice, but the confrontation strains all sides and lands Munna and Circuit in custody.
In the end, Jahnvi reconciles with Munna at the police station, and Lucky agrees to bail him out, restoring the key to Jahnvi’s home. Munna and Jahnvi marry and continue their shared radio endeavor, now branded Gandhigiri, a term that captures their renewed devotion to Gandhi’s principles in everyday life. Across the house and the city, the characters experience a ripple of change: Circuit is adopted by a loving senior couple who admire his quirks; Victor earns the respect of his father and achieves personal success; Simran and Sunny begin a life together and even welcome a child; Khurana reevaluates his beliefs, removing Batuk and discarding the misconceived power of numerology. In a final, reflective moment, Gandhi’s presence returns for Lucky, as he sits in the same library where Munna once studied, suggesting that even the hard edge of a skeptic can be softened by the quiet strength of truth and compassion.
