In 1971, at a Texas fraternity house on the University of Texas campus in Austin, a graduation party kicks off the long summer before many of the Groovers head off to whatever comes next. The group is led by Gardner Barnes [Kevin Costner], a charismatic anchor who pulls the crew through the night with a mix of swagger and care. The core circle includes Kenneth Waggener [Sam Robards], who has just learned his draft deferment has expired and is about to be drafted, and Phil Hicks [Judd Nelson], a ROTC devotee whose ambitions rub against the realities of growing up. The mood shifts when Phil’s parents arrive to meet the gang, along with the seminary student Dorman [Chuck Bush], hinting at the different paths that lie ahead for each of them.
Kenneth interrupts the revelry with the news that he’s been drafted, and Gardner’s own notice arrived weeks earlier. Kenneth also reveals that he plans to call off his engagement, a decision born of fear and the looming changes in their lives. In response, the Groovers decide to seize one last stretch of youth with a road trip. They plan to visit a notorious roadhouse and, in a kind of wild rite of passage, dig up something near the Rio Grande—something they call Dom. They drive through the night, pushing toward whatever comes next, with Gardner urging the trip onward even as some in the car hesitate.
When Phil’s car runs dry, the group faces a tough choice: walk the long miles to the nearest town or cling to the car and hitch a ride. Phil stubbornly refuses to leave the car behind, and a reckless idea emerges to lasso a passing train. Dorman helps execute a risky plan, tying the bumper to the train with fence cable. The front end of the car is torn off, leaving the vehicle stranded on the road, yet the Groovers press on, pushing the wreck to a nearby garage. They grab a bite at a Sonic Drive-In and then flirt with townie girls, who eventually guide them to a cemetery run by the daughter of an undertaker. The night somehow finds them passing the old Giant movie set, and sleep comes in a place steeped in memory and myth.
The next day, the car is repaired with a front end from a different model, and the journey continues. A rift forms as Phil pushes to turn back, while Kenneth voices a contrary view. Gardner confesses a blunt truth: the only reason Phil has spent time with them is that they felt sorry for him. Humiliated, Phil vows to prove himself, challenging fate and inviting risk. The group spots a parachute school and Gardner schemes to secure a free lesson for Phil from the instructor, Truman Sparks [Marvin J. McIntyre]. Phil climbs into the aircraft, dragging Truman’s laundry along as a mistaken cargo. From the ground they race to warn him, but the situation becomes a tense test of nerve. Eventually, Phil manages to trigger an emergency parachute with help from a walkie-talkie, and the boys capture a moment of triumph with a photograph of their daring.
After charting a path of destruction and discovery, they find the roadhouse burned to the ground, a symbol of the past now ghosted by time. The road leads to a bluff overlooking the Rio Grande, where they finally dig up Dom—a magnum of Dom Pérignon. They drink to their freedom and youth, and the toast takes on a new, complicated meaning. The moment weighs on Kenneth, who begins to reconsider his engagement, and Gardner resolves to repair what he can in the lives around him.
Gardner makes a bold move: he calls Kenneth’s girlfriend to reaccept the engagement and arranges for Truman Sparks to fly her from Dallas to the border town and back. When the truth comes to light, Kenneth’s girlfriend is revealed to be Debbie, Gardner’s ex, played by Suzy Amis [Suzy Amis]. Through a resourceful, stone-soup style plan, Gardner orchestrates a wedding setup for Kenneth and Debbie, while Lester—Lester Griffin [Brian Cesak]—slips back into consciousness after a fitful moment in the background. The ceremony unfolds, and afterward Debbie shares one last dance with Gardner, a fandango that glides between longing and farewell. She ultimately shakes her head, kisses him on the cheek, and walks away, choosing a different path.
In the wake of the wedding plot, Phil Hicks lends a hand as a gesture of friendship, presenting Kenneth and Debbie with his car as a practical gift for their new life together. The film closes with the hard-won sense that these friendships will endure even as life takes each of them toward separate futures. On a cliff above the town, Gardner lifts a beer in a quiet salute to his friends, a final gesture that marks both an ending and a beginning.
