During the opening credits, a lively brass band plays Death or Glory, capturing the stark reality of coal miners returning from their shifts, covered in dust and heading for much-needed showers. Outside the mine, neighbors are seen protesting against the looming pit closures, showcasing the community's struggle.
As the music fades, Gloria Mullins arrives at a boarding house known as The Lantern, carrying her flugelhorn case. The house lady, noticing her instrument, suggests that Gloria might want to check out the Grimley Colliery Band's rehearsal hall, where her musical talents would surely be welcomed. Gloria has returned to her hometown to write a report for the British Coal Board regarding the Grimley mine’s future.
Meanwhile, in a conversation between Vera (Sue Johnston) and Ida (Mary Healey), concerns about their husbands, Jim (Philip Jackson) and Ernie (Peter Martin), possibly leaving the band arise if the mine indeed shuts down. As Jim and Ernie make their way to band practice, they reluctantly decide to inform Danny (Pete Postlethwaite), the band's director, that financial strains compel them to withdraw from the band.
At rehearsal, Danny's son Phil (Stephen Tompkinson), burdened by debt and facing pressure from his wife Sandra (Melanie Hill) to accept redundancy, shows up and is let down by the band's performance. During this moment, Gloria walks in, hoping to join them. Though initially met with skepticism, her connection to Grimley earns her a spot in their practice. She sits next to Andy (Ewan McGregor), an old acquaintance she doesn’t immediately recognize. Gloria's flugelhorn is a cherished heirloom from her grandfather, and they quickly delve into rehearsing Rodrigo's Concerto Aranjuez, leaving the band impressed with her abilities.
With Gloria’s presence, enthusiasm begins to return. The band members find a renewed sense of purpose and decide to partake in fourteen contests across various villages. However, heavy dark clouds loom over their spirits; Danny soon reveals signs of pneumoconiosis, a grim reality of their profession.
At a union meeting, Phil shares his frustrations about his past with the striking miners and their current predicament, torn between accepting redundancy or pursuing the union's recommendation for a review to potentially save the mine. As the band travels from one competition to another, the sense of hope fluctuates—their performances gradually decline amidst personal struggles.
As tensions rise, Andy confronts Gloria about her job with management, expressing skepticism about her intentions. Their relationship becomes strained despite brief moments of reconciliation. Meanwhile, Phil’s struggles intensify as he tries to manage his family's needs while pursuing his passion for music, even resorting to performing as Mr. Chuckles at children's parties, only to face public humiliation and despair.
In a darkly humorous yet tragic twist, Phil attempts to take his own life. However, the intervention of Danny and the other band members highlights the bonds that hold them together. In a crucial moment, Gloria shows her dedication by volunteering to fund the trip to the National Finals, reigniting the band's ambitions.
As they finally embark for London, emotional stakes soar, leading to a dramatic performance of the William Tell Overture. Danny, having departed the hospital against orders, surprises everyone with his presence, culminating in a heart-wrenching moment where he refuses the trophy, opting instead to voice their plight against government negligence that has devastated their community.
In a triumphant yet poignant conclusion, the band parades through London, celebrating their shared spirit and camaraderie. Gloria and Andy find deeper connections amid the festivities, leading to an impactful kiss that signifies hope. As they play Pomp and Circumstance during their celebratory ride, the entire village unites, echoing their resilience against adversity as the credits roll.
