Frank is a dedicated baker who spends his days providing fresh bread for his family's business. On one fateful day, while making deliveries along a desolate mountain road painted in hues of blue, he receives a concerning call from his friend Kip. Kip mentions an unpleasant odor he cannot shake off and is resorting to desperate measures to resolve it. Throughout his journey, Frank clutches a photograph of his beloved wife, Rita, highlighting the deep emotional connection and the lingering presence of his grief.
As Frank continues along the road, he encounters a cheerful elderly man who appears content. However, further down the path, he comes across the man's wrecked car, revealing the gravity of the situation. The man, although injured, maintains a coherent conversation. Realizing the severity of the circumstances, Frank immediately calls 911, his selfless instinct kicking in as he ensures the man's well-being.
Through this harrowing moment, we learn about Marilyn Hotchkiss' Ballroom Dancing & Charm School, where the injured man, named Steve, was headed to meet someone named Lisa on a significant date— the fifth day of the fifth month of the fifth year of the new millennium. In a surprising twist, Frank decides to take Steve's place at the dance class, as vibrant colors return to his life. Upon signing in, Frank is greeted by the instructor, Marienne, who fills in for her mother. An old man discreetly informs Frank that Marilyn has passed away since the 1970s, yet the dance class continues with enthusiasm.
As the lessons begin, Marienne exemplifies the Lindy Hop alongside Randall, a charismatic dancer. Eventually, she encourages Frank to join in, and he finds himself dancing with various partners, although none can replace Lisa in his heart. One partner, Meredith, arrives with a suspicious black eye but insists it's from a fall, adding a layer of intrigue.
In parallel, Frank grapples with the shadows of his past. Back at work, he shares with his colleague Samson his decision to explore the dance class, a sign that he is attempting to move forward from the loss of Rita. Frank's journey through grief continues as he joins a support group alongside others, including Kip, whose own struggles start to make sense amidst their shared experiences.
Meanwhile, at the crash site, the blue-toned ambiance returns as paramedics arrive. Frank learns that Steve's best chance for survival hinges on keeping him awake and engaged in conversation while they await help. Their dialogue unveils a story from 1962, taking a nostalgic look back at Steve's youth, marked by playful yet chaotic adventures with friends Peter and Dulin. The boys' antics escalate into a mock combat scenario, revealing their carefree attitude toward girls, leading to unintended consequences when Steve accidentally gives Lisa a black eye during a game.
As the narrative shifts through time, we witness the boys sneak into Marilyn Hotchkiss' school to witness the humorous and clumsy dance lessons. Eventually, both Steve and Peter are enrolled in the school, begrudgingly trading their carefree attire for formal suits and dresses. Despite their disdain, Steve's motivations change when he encounters Lisa again, who is still nursing her injury, igniting a spark of sentimental connection.
The film intertwines scenes from 1962, the present-day ambulance scenario, and Frank’s gradual acceptance of his grief. This exploration of past and present emotions culminates at Suicide Bridge, where Frank scatters Rita's ashes, symbolizing a poignant farewell. As his past weighs heavily on him, he attempts to reconnect with Meredith but finds himself hesitating, illustrating his ongoing struggle with the remnants of loss.
Throughout the dance classes, Frank’s interactions reveal underlying dynamics as Randall, a fiercely protective figure, grows envious of Frank’s budding interest in Meredith. After an altercation leaves Frank injured, emotions run high as Randall is suspended from the class. This friction, however, leads to a resolution where they ultimately reconcile, even as Frank begins to realize the importance of moving on.
The climax of the story arrives in a heart-wrenching moment as Steve succumbs to his injuries despite Frank's best efforts. Frank delivers the sorrowful news to Lisa, who reveals she has held onto memories of their intended reunion, rendering the moment bittersweet.
As the tale of Steve reveals more about his complicated life, including his time in prison for robbery, we see how interconnected destinies weave through the narrative. The film concludes with a hopeful scene as Meredith visits Frank's workplace, suggesting that new beginnings might be on the horizon for both of them, interlacing themes of loss, healing, and the enduring power of connection.
