Chuck Wepner, portrayed by Zach McGowan, navigates the challenging life of being a top-ten heavyweight boxer, constantly striving to support his wife, Taryn Manning, and their children. The pivotal moment arrives when he learns he's set to face none other than the legendary Muhammad Ali, igniting a storm of preparation alongside his trainer and manager, Joe Pantoliano, who plays Al Braverman. As the showdown draws near, Chuck's training ramps up significantly. However, just before their press conference, Ali's shocking request to deliver a tirade filled with racial slurs for publicity turns Chuck's world upside down – a proposal he firmly declines.
When the much-anticipated night of the fight finally comes, Chuck manages to deliver a stunning punch that knocks Ali down, leaving the audience in awe. Yet, despite his valiant effort, he ultimately succumbs to defeat, knocked out in the final 15th round. Paradoxically, this loss earns him local hero status, and his remarkable battle against Ali is immortalized in a film that takes home top honors at an awards ceremony. Unfortunately, the rise to fame proves to be a double-edged sword for Wepner. Caught up in the whirlwind, he begins engaging in reckless partying, extramarital affairs, and cocaine use, which ultimately leads to the collapse of his marriage with Phyllis after a bitter clash.
After a journey of self-reflection, during which he experiences a surreal wrestling match with the towering Andre the Giant, Chuck meets Linda, played by Amy Smart, at a bar, marking a new chapter in his life. He also seizes the opportunity to audition for Rocky II, only to have his part slashed after a confrontation with Anthony Mangano, the producer, creating a rift between them. In the chaos, he loses touch with his brother, Nick Loeb.
In a string of unfortunate twists, Wepner engages in an unsanctioned match against Victor, a wrestling bear, which sees him incarcerated due to a failed drug deal. During his time behind bars, he unexpectedly runs into Stallone, who is filming Lock Up. After two years, Chuck’s sentence ends, and he finds love again with Linda, leading to a hopeful new beginning.
By 1993, Wepner has turned his life around, embracing his role as a liquor salesman while distancing himself from drugs and healing his relationship with Donnie. However, an encounter with John Olson thrusts him into a web of sports memorabilia fraud, landing him in legal trouble. Fortunately, his charges are minimized, allowing him to steer his life back toward redemption.
As destiny would have it, Wepner encounters Stallone once more on the set of Cop Land, reigniting feelings of being underappreciated for his role in Rocky. Fueled by determination, Chuck takes legal measures against Stallone, eventually achieving a settlement that grants him a stable life, free from the shadows of his past.
