The world was not always governed by the four seasons. In the beginning, only Winter existed, but this solitary season found its existence too lonely to bear. In an act of sacrifice, Winter split off part of its own being to create Spring, giving it something to love. As the earth desired more time to rest within the cycle, Summer and Autumn were eventually born as well. The monumental task of carrying the seasons and transitioning the world from one to the next fell to humanity. Those chosen for this sacred duty are known as the Agents of the Four Seasons. They are not merely humans with a job; they are living avatars who, through song and dance, summon the very essence of their respective season across the land of Yamato.

The story begins after a decade of imbalance. Ten years prior to the events of the series, Hinagiku Kayou, the gentle Agent of Spring, mysteriously vanished from the world. With her disappearance, the season of spring itself vanished as well, leaving Yamato trapped in a seemingly endless cycle of autumn, winter, and summer, but no renewal. For ten long years, her devoted guard, Sakura Himedaka, has carried the weight of her failure, searching tirelessly for her lost master while the world grew colder and forgot what warmth felt like.

Now, after incredible hardship and suffering, Hinagiku has returned. She is quiet, weathered, and different from the person she once was, carrying the unseen scars of her long absence. The central narrative of Agents of the Four Seasons: Dance of Spring follows this newly reunited pair as they embark on a poignant journey across the frost-covered countryside. Their mission is nothing less than the restoration of the natural order: to perform the sacred dance that will summon spring back to Yamato for the first time in a decade. However, the path forward is complicated by the trauma of the past. The circumstances surrounding Hinagiku's disappearance are a mystery, one tied to a terrible incident that also deeply affected the other seasonal agents and their guardians.

The setting is a version of modern Japan, referred to as Yamato, where cars, helicopters, and television news exist alongside ancient traditions and divine powers. This urban fantasy backdrop creates a unique contrast, where the public watches a live broadcast of the Agent of Spring performing her ritual as if it were a major national event, and the stock market fluctuates with the arrival of the cherry blossoms. The Agents operate within a structured bureaucratic organization known as the Four Seasons Agency, which manages their movements, protection, and the immense political and economic implications of the seasonal transitions. The Agents themselves wear attire reminiscent of traditional Japanese garments and wield folding fans for their summoning dances, while their Guardians, sworn to protect them with their lives, carry katana and wear more modern clothing.

The main characters are defined by their relationships to the cycle and to each other. Hinagiku is the heart of the story, a returning goddess whose quiet demeanor hides a deep, almost mythical connection to Winter. Rousei Kantsubaki, the stoic and powerful Agent of Winter, is deeply connected to her. The myth passed down since the dawn of time says that Spring sends its love to Winter, and this emotional thread is central to the narrative, as Hinagiku's return stirs feelings that have been frozen for a decade. By her side is Sakura, whose guilt over failing to protect her master ten years ago drives her to be fiercely protective, even as she struggles to reconcile the Hinagiku who left with the one who has returned.

The narrative unfolds across several notable arcs that go beyond the simple restoration of a season. The series introduces the other Agents and their complex political dynamics. Ruri and Ayame Hazakura, the twin Agents of Summer, along with their own personal struggles and arranged engagements, represent the next generation of the cycle. Nadeshiko Iwaizuki, the Agent of Autumn, and her guard Azami Rindou, bring their own perspectives on duty and loyalty. As Hinagiku and Sakura travel to restore spring, they become entangled in the political machinations of the Four Seasons Agency. There are factions within the organization, old grudges, and conspiracies that hint that Hinagiku's disappearance was not an accident but part of a larger, more sinister plot involving powerful families and fanatical groups. The story weaves together the personal quest for healing and renewal with a larger mystery about the very nature of the seasons and the hidden conflicts threatening to tear the cycle apart from within.