In the Wind Kingdom of Ventfleur, Princess Natalia ascends to the throne after losing her father, brother, and nearly all of her family in quick succession. Known as the child of the spirits, she is beloved by her people, yet she is consumed by grief. The only comfort she finds is in Sylphide, the holy sword blessed by the wind spirit Sylph, which serves as the symbol of royal succession. It is said that touching the sword allows one to see the memories of past kings, but Natalia feels nothing—only a hollow sense of relief from holding it. Her emotional state deteriorates as she struggles to live up to her role and the expectations placed upon her.

One day, a cheerful and enigmatic nun named Sara appears before Natalia and declares that she will make the princess healthy again. Despite Natalia's initial resistance, Sara persists, visiting her daily under the pretense of offering comfort and assistance. But Sara is not what she seems. She harbors a secret: the royal sword Sylphide has taken root inside her own body, and she has her own reasons for staying close to Natalia. As the two grow closer, Sara's hidden agenda and the truth behind the sword's power begin to surface.

The narrative unfolds through a series of chapters named after flowers, each carrying symbolic meaning tied to the characters' emotional journeys. Early arcs focus on Natalia's slow recovery from trauma and the tentative bond that forms between her and Sara. Later arcs introduce external threats: a mysterious serpent-like figure who knows Sara's secret and targets her, as well as a more profound revelation that activating the sword's full power may require Sara to sacrifice her own life. This forces Natalia to confront an impossible choice between protecting the one she has come to care for and fulfilling her duties as ruler.

The story blends fantasy worldbuilding with a slow-burn emotional romance, emphasizing themes of loss, healing, trust, and the quiet courage of opening one's heart again.