Caroline "Line" Found, portrayed by Danika Yarosh, shines as the esteemed volleyball captain at Iowa City West High School. Beloved by her peers and community, Line shares a profound bond with her childhood friend, Kelley Fliehler, played by Erin Moriarty, who she views as the strongest player on the team. Under Line's leadership, the Trojans are on an undefeated streak, igniting hopes for a championship title for the second consecutive year against their fierce rivals, City High. It's a historic opportunity, as no school has ever claimed the title back-to-back. Line's infectious spirit captures the hearts of the entire town.
However, the team's momentum takes a heartbreaking turn when they lose their first match of the season due to a misfire from Kelley, leading to her being benched by Coach Kathy Bresnahan, played by Helen Hunt, after the first set. In a moment of desperation, Line sneaks away during a party to visit her ailing mother, Ellyn, portrayed by Jillian Fargey, at the hospital. Tragically, that night, Line’s life is cut short in a moped accident, leaving her community in profound grief.
In the wake of Line's untimely death, her mother Ellyn, determined to pay her last respects, walks to her daughter's casket, but days later succumbs to cancer, pushing Ernie Found, played by William Hurt, into deep mourning for both his wife and daughter. Despite the school's overwhelming sorrow, Coach Bresnahan valiantly continues practices, but the players initially resist attending. She reaches out to Kelley, underlining that Line would want them to continue. With encouragement, Kelley agrees to rally the team, understanding that they must press on for Line's memory.
As the season progresses, the Trojans grapple with their grief. Kelley, now forced into the role of the setter—a critical position crucial for game control—struggles with the pressures of leadership and doubts from her teammates, who question her worthiness without Line's presence. Under Bresnahan's demanding guidance, the team endures rigorous drills, culminating in Kelley proving her skills and earning her place.
As weeks transform into triumphs, the Trojans secure wins, driven by the desire to honor Line by capturing the state championship. A poignant turning point occurs when Kelley receives a heartfelt token from Ernie, encouraging her to "Live Like Line," a message that resonates with the team. Clad in jerseys honoring Line, they proceed to the state tournament. With victories in the quarter-finals and a challenging semi-final, they arrive at the championship match against City High.
In a gripping showdown, the Trojans, led by Kelley—now officially designated captain—defy expectations. A fierce battle ensues with City taking an early lead, but through teamwork and Kelley’s strategic plays, they force a decisive fifth game. Ultimately, the Trojans emerge victorious, reclaiming the state championship. Celebrations erupt as “Sweet Caroline” plays in honor of Line, with Kelley proudly holding up her picture, a testament to her lasting legacy.