In the serene setting of 1962 South Carolina, Lt. Col. Wilbur "Bull" Meechum, an esteemed aviator known as "the Great Santini" among his Marine peers, relocates his family to the picturesque town of Beaufort. His wife, Lillian, endures his fiery temperament and penchant for whiskey with quiet resilience, often managing the chaos that ensues. Their teenage children, Ben and Mary Anne, grapple with their father's stern discipline as they acclimate to their new life filled with both anxiety and a strong sense of determination.
Ben, blessed with a natural talent for basketball, quickly earns his place on the school team and emerges as a formidable player on the court. However, the brutal practice sessions at home with his father reveal a harsher reality—Meechum's unyielding approach, where he absolutely refuses to allow Ben any victory, instead resorting to harsh physical tactics and biting remarks. The tension culminates when Ben finally beats him; Meechum responds with a furious outburst, expressing his disappointment by bouncing the ball off his head in utter disdain. Later that evening, while discovering his father shooting hoops alone in the driveway, Lillian gently advises Ben to be considerate of Meechum's feelings, sharing that he feels vulnerable in losing control over his life.
As the family's struggles simmer beneath the surface, a turning point occurs during an intense school basketball game when Meechum insists that Ben retaliate against an opponent who has committed a foul. Ben takes this advice to heart, resulting in a devastating tackle that not only breaks the opponent's arm but also leads to his ejection from the game and dismissal from the team.
Seeking comfort, Ben forms a close friendship with Toomer Smalls, a young black man facing relentless bullying from Red Pettus. In a daring act of defiance, Toomer uses a beehive to exact vengeance on Red, but fate takes a tragic turn when Red, in the chaos, accidentally shoots him. Ben arrives too late to save Toomer, who succumbs to his injuries, deepening the emotional scars of their community. Infuriated by Ben's disobedience, Meechum expresses his rage, yet another Marine takes a different stance, acknowledging Ben's courage in standing by his friend.
Despite the ongoing emotional turbulence, Meechum stays emotionally distant from Ben, oblivious to his son’s sensitive nature. In a fateful decision, he embarks on one last aerial mission, a choice that becomes exceptionally critical. When his plane suffers engine failure, he chooses to crash into the ocean rather than eject and endanger innocent lives on land. The Meechum family gathers to mourn at a heartfelt funeral service in Beaufort, marking the end of an era before they move on to start anew elsewhere.
In the wake of Meechum's passing, Ben unexpectedly assumes the role of the family's leader, seemingly fulfilling an unspoken expectation from his father to embrace the weight of responsibility and authority that now rests upon his shoulders.
