Lucy is a maid who has worked hard since childhood to repay the kindness of the orphanage that raised her. Despite being mistreated while serving a baron's household, she endures her harsh circumstances quietly. Her most distinctive feature is her eyes, which sparkle like a starry night sky.

Her life takes a dramatic turn when she is suddenly abducted by a mysterious handsome man. He reveals to Lucy that she is a resident of Sky Island, a floating landmass suspended three thousand meters above the ground. More importantly, she is the reincarnation of the Stardust Goddess, a being whose power is essential to keep Sky Island aloft. The island is now in imminent danger of crashing, and to prevent this catastrophe, Lucy must embrace her destiny: find true love and marry one of the four princes who live on Sky Island.

Despite the high stakes, Lucy is reluctant. She has never been in love and cannot imagine forcing herself into marriage. To pressure her into compliance, those who brought her to Sky Island warn that if the island crashes, the destruction will also threaten her hometown on the ground. Trapped between saving her former home and her own heart, Lucy is forced to confront a fate she never asked for. Her journey weaves together the search for a destined love with the quirky personalities of the four princes she is now expected to choose from, as she attempts to navigate a path that satisfies both her captors and her own desire for genuine affection.