The character known as Father, a bamboo cutter dwelling in a secluded forest shack with his wife, grapples with profound grief after their biological daughter’s death. While investigating a mysterious explosion and glowing anomaly near her gravesite, he stumbles upon a luminous egg. It hatches into a quiet child with piercing blue eyes, who matures unnervingly fast into an eight-year-old girl. Despite her uncanny origins, he and his wife embrace her as their own, bestowing the name Kaya in memory of their lost daughter.

Their lives shift when the eggshell’s golden core grants them unexpected fortune. As Kaya grows into adulthood, her ethereal qualities fade, drawing the attention of aristocratic suitors tasked with perilous trials to earn her favor. Father stands by Kaya, navigating the chaos wrought by these pursuits.

A celestial craft’s arrival to reclaim Kaya forces him to confront her departure. Though he masks his sorrow, tears betray his resolve during their final moments. His journey—woven through cycles of love, mourning, and adaptation to the inexplicable—culminates in reluctant acceptance of her cosmic fate, yet clings to the enduring connection forged through shared sacrifice and unconditional devotion.