In 1965, a cold, northern coal town named Iwaki stands on the brink of decline as cheaper oil reshapes Japan’s energy landscape. To keep its workers employed, the mining company imagines a bold plan: use hot springs that seep into the mines to heat a new project—a “Hawaiian Center” spa resort. The idea is met with hostility from conservative, blue-collar miners, but the company moves forward by recruiting a down-on-her-luck dance instructor from Tokyo, Madoka Hirayama, to train local girls in the art of the hula.
At first, only a small, reluctant group steps forward. Sanae is anxious about her widowed father losing his job and the ability to support his four children, so she convinces her lifelong best friend Kimiko to join. Rumors swirl at the initial gathering that the dancers will perform topless, and most of the attendees bolt in fear or anger. The two girls stay to hear the assurances that the rumors are false, joined by Hatsuko, the organizer’s secretary, and Sayuri, a large but clumsy girl who notices the potential in the plan.
Training gets off to a rocky start. Hirayama nearly abandons the project, but the girls’ stubborn enthusiasm rekindles her resolve and she decides to persevere. A family quarrel balloons: Kimiko’s mother, Chiyo, clashes with her daughter, prompting Kimiko to leave home and find refuge at the school. As unemployment bites deeper, some of the other girls drift away and then return, drawn by the stubborn hope of better prospects.
Tragedy strikes when Sanae’s father is fired and comes home to find her in a Hawaiian costume, which triggers a violent confrontation. Hirayama reacts instinctively, defending the girl, and the father leaves town in search of new opportunities. Sanae follows, taking the responsibility of caring for her siblings, while Kimiko, newly chosen as the leader, promises to carry on the mission.
Kimiko’s resolve wavers under the weight of leadership, but her brother urges her to see the work through. She tightens her focus just in time to join the publicity tour, giving the troupe a renewed sense of purpose. The first performance on the tour is a disaster, yet the group gradually coalesces into a cohesive unit, and the tour begins to draw real crowds.
A sudden crisis then tests their resolve: a mine accident leaves Sayuri’s father gravely injured. Hearing the news just before the last scheduled show, the troupe contemplates returning home to care for their loved ones. Sayuri pleads to finish the tour, and the bus pulls into town hours after her father’s death. Hirayama confesses her own fault for not returning sooner and contemplates leaving, but is stopped by her devoted students who insist she stay.
Complications persist as the resort’s grand opening faces a new threat: unusually cold weather could jeopardize the imported palm trees. A package from Sanae arrives for Kimiko, and Kimiko’s mother witnesses the remarkable progress her daughter has made. Chiyo picks up a job as a scrap collector to support her daughter’s dream and even attends the opening night, where Kimiko wears the flower Sanae sent.
The opening night turns into a triumph, and the Joban Hawaiian Center secures its place as a budding tourist destination. The girls’ dedication, Chiyo’s sacrifice, and Hirayama’s guidance unite to transform a fragile idea into a lasting symbol of hope for the town. Through struggle, setbacks, and shared work, what began as a controversial plan ends up marking a new chapter for Iwaki and the people who believed in its possibility.
