The movie opens with an insightful documentary on the Rucker Park Legends, featuring renowned basketball stars like Dikembe Mutombo and Steve Nash discussing the legendary Uncle Drew (Kyrie Irving). Known for his exceptional talent on the court, Uncle Drew had once played with a formidable team until a scandal—allegations of infidelity—broke them apart.
In contemporary settings, we encounter Dax Winslow (Lil Rel Howery), an aspiring basketball coach who is haunted by bitter memories and rivalry. His old adversary, Mookie (Nick Kroll), poses a new threat by attempting to lure Dax's star player, Casper (Aaron Gordon), away. Eager to maintain his position, Dax tries to secure a new pair of Jordans for Casper, a request expected from his life at the shoe store.
Haunted by the trauma of growing up in an orphanage and being deprived of adoption, Dax’s memories intertwine with his passion for basketball, overshadowed by Mookie's past mockery during a crucial game. Now living with his girlfriend Jess (Tiffany Haddish), Dax struggles with feelings of inadequacy, frequently leaning on her for support.
While at the shoe store, a glimmer of hope appears when Casper and his friends come in, but financial limits force Jess to step in to support Dax. True to his word, Dax believes Casper could lead their team in the Rucker Classic tournament. However, things take a turn when Dax discovers Mookie has taken over coaching their team, prompting a viral incident that results in Jess kicking Dax out of her apartment.
Now homeless and desperate, Dax seeks players but faces rejection until serendipity introduces him to Uncle Drew. Observing Drew's remarks about the lackluster performance of current players, Dax persuades him to join his team. Drew agrees, but only if Dax can reunite his old crew. Thus begins their adventure across cities, starting with a visit to Preacher (Chris Webber) at a church, where a comical baptism incident makes Dax question his calling. They encounter Betty Lou (Lisa Leslie), Preacher's adamant wife, who initially forbids him from playing.
Their quest leads them to an arcade where they find Lights (Reggie Miller), whose apparent blindness doesn’t deter him from eagerly joining the team. They also visit a retirement home to invite Boots (Nate Robinson), who surprises everyone with his old reflexes. A tense reunion ensues when they approach Big Fella (Shaquille O'Neal), who begrudgingly agrees to join despite unresolved issues with Drew.
As their ragtag team preps for the tournament, they face financial struggles—culminating in a losing bet against a girls' basketball team that ultimately teaches them resilience and community spirit. With each game, Drew’s leadership shines, but a heart-wrenching visit to Big Fella's wife's grave reveals deep-rooted grievances that must be addressed for healing to occur.
The team rallies together, overcoming the odds and taking part in lively celebrations, showcasing their dancing skills after triumphs. Midway through the games, tragedy strikes when Big Fella suffers a heart attack, leading to an unexpected change in dynamics as Betty Lou steps in to help the team.
The climax unfolds during the final showdown against Mookie, who has now romantically linked with Jess. As chaos reigns and injuries threaten to derail their efforts, Dax rises to the occasion, using his newfound confidence to secure the victory with a winning shot against Mookie. The cheers from his team, the respect from Mookie, and a moment of courage shared with Maya encapsulate the film's uplifting spirit.
In the aftermath, the team visits Big Fella in the hospital, basking in their collective achievement as a news report highlights Dax's remarkable transformation. During the credits, a wistful phone call from Jess echoes Dax’s unwavering resolve as he embraces his new-found identity—celebrating the trials and triumphs they all endured together, including behind-the-scenes glimpses of the actor’s transformation into their older characters.
