Mike Sardina link is a man who has spent twenty years clean, and the film opens with him marking another Sober-Anniversary at an AA meeting, where his quiet centerpiece is a performance of “Song Sung Blue.” From there, the story sweeps us to an amusement park where he sheds his leather jacket, slips into a bright Hawaiian shirt and a wig, and is hired to impersonate Don Ho for a troupe that also does Elvis, Buddy Holly, and Little Richard. When he refuses to stay in character and insists on being himself—“Lightning”—he quits the group just as Claire Sardina link readies her Patsy Cline act. What follows is a blunt, honest exchange: Claire suggests he should chase the Neil Diamond route instead, and Mike, curious and cautious, accepts.
As Mike watches Claire sing, he is drawn to her in a way that goes beyond admiration. He heads home, pulls out a Neil Diamond record, and begins to practice along. The next day, he becomes a guitarist for a band called “The Esquires” at the same park, while Claire comes to watch. After their gig, the two talk and discover that their previous marriages mirrored each other—each woman had left because she felt diminished. Mike lays bare his past mistakes and explains that he has been striving to grow and do better.
At Claire’s house that evening, she introduces her two children from a prior marriage—Rachel and Dayna—and Mike opens up further about what he said the other night. Claire proposes a new kind of collaboration: rather than an impersonator, view him as a Neil Diamond interpreter. The duo finds common ground in music, and a late-night jam session ensues, with Claire joining Mike on harmonies. They wake Claire’s mom with their loud singing, but Mike eases the moment by pulling off “Play Me,” and Claire harmonizes. As they walk Mike to the door, a playful moment becomes something more: they muse about a name, and “Lightning” meets a spark of realization—Claire could be “Thunder.” Mike confirms, and their kiss seals the new partnership.
Their next steps are coordinated with a small, practical team: Mike’s manager—who also happens to be his dentist, who fixes a missing tooth with a lightning-bolt inset—joins the effort along with the Buddy Holly impersonator who runs the troupe. The plan is to fuse The Esquires with their new “Lightning and Thunder” act. The family expands as Dayna and the kids settle into the shared life, while Rachel, the elder daughter, develops a bond with Angelina, Mike’s daughter from his first marriage who comes down from Florida. Angelina’s visit sparks a sense of unity as the two women compare notes about their chaotic parents and growing respect for each other.
The couple’s home life deepens the mix of music and love with practical drama. They rehearse in a garage where neighbors and even Dayna’s younger brother get swept up in the energy. Their debut at a local bar turns tense when the crowd—larcenous bikers among them—disregards the set and jeers at Neil Diamond. Mike stands his ground when one patron dismisses the music, and the night ends in a heated exchange that almost shatters the wedding plans. Yet a montage quickly follows, showing a rapid ascent: a wedding, successful shows, and an unexpected opening act slot for Pearl Jam. Weeks later, Mike plans a romantic evening and even a ring, but Claire’s life takes a frightening turn when a car slams into her while she’s gardening.
In the hospital, Rachel meets her family as Claire fights to recover. Mike cannot bring himself to talk about the situation, so he steps into another room to explain to Rachel what’s happening. A heart attack interrupts, and with improvised defibrillator knowledge—an old military trick—Rachel must carry out a life-saving shock. Claire awakens with the realization that she has lost her left leg below the knee. The family holds together as Claire confronts the new hardship, and she enters a long, trying recovery that includes prosthetic work and a creeping sense that her singing dream might slip away.
Claire’s struggle with identity and purpose becomes a central thread. Sessions with doctors reveal that she’s not finished with singing; she’s just reoriented her dream. Meanwhile, Mike adapts, taking on hosting gigs at a Thai restaurant for karaoke nights, where he still carries Neil Diamond as his baseline—though Wednesday nights belong to the duo’s evolving act. Tensions flare when Claire accuses Mike of infidelity—tensions burn hot but are tempered by the family’s bond and the arrival of Angelina’s blunt, practical wisdom.
A turning moment comes when Angelina urges Mike to confront his AA commitments, and his admission that singing only matters when Claire is singing with him reignites their partnership. One night, Claire awakens to smoke and follows it to a backstage space where the microphone seems to call her name. She begins to sing, and midway, she hears Mike’s voice urging her to get up, pulling her back from a dangerous edge. The scene is a stark reminder of how entwined their lives have become, a bond that holds them through fear and fatigue as Dayna and Rachel watch with worry and love.
The family makes the difficult decision to seek psychiatric help for Claire, and Mike experiences a rare moment of vulnerability as he supports her return home for Christmas. Claire’s breakthrough comes when she realizes that losing her leg did not end her dream, and together with Mike, she sets a course to revive Lightning and Thunder. They rehearse again, finding strength in each other and in the kids who have become a second family. The pregnancy accompanying Rachel’s life adds a new layer of responsibility and hope, and the family charts a plan for adopting the child to a loving couple she has already begun to connect with.
As the holidays approach, Claire and Mike propel themselves toward a big comeback: a headlining slot at the Ritz in Milwaukee, timed to coincide with Neil Diamond’s sold-out show in the same city. The show’s mood is electric, and the couple once again experiences the surge of life that music can bring. The production team reveals a surprise: Neil Diamond will meet them after the performance at a local ice cream parlor, a moment that would crown their dream.
Tragedy interrupts at the last moment when Mike suffers another heart attack during the gig, collapsing and striking his head on the sink as he falls. He wakes, joked about his head injury, and with Rachel by his side, his courage never wavers. Backstage, the family prepares for the night’s end as a chorus of familiar faces and friends flood the venue. The show begins and ends with thunderous applause, and afterward, the family heads to the ice cream shop only to discover that Neil Diamond has already finished his own set and is on his way. After a suspense-filled kiss, Claire learns that Mike has just died.
In the days that follow, the funeral becomes a testament to their love and shared music. Rachel drafts a heartfelt speech, Dayna urges her to sing, and Claire musters the courage to perform, turning a pain-filled moment into an intimate tribute. The film closes on a quiet, hopeful note: a recording of Mike’s pre-show AA speech marks a final milestone—his 22nd Sober-Anniversary—played as Rachel tends to a vehicle, and Claire and Rachel plant flowers where the earlier tragedies occurred, a family ritual that asserts light and resilience in the wake of loss.
