Sunwoo Kong, a legendary figure concerned about being deemed 'too important' for everyday tasks, takes on a part-time job as a Cloud Courier delivering packages across the magical Sky-Town. Joined by his sarcastic cloud companion, Wisp, and riding his stardust-powered scooter Luna, Sunwoo quickly finds his 'simple' job spiraling into a series of bizarre transformations. Each inadvertently opened package unleashes a temporary magical effect: first, he sprouts cat ears and a tail from a 'Feline Fancy Elixir,' then his hands become giant sticky green gloves from 'Adhesive for Astral Apparatus.' Next, a 'Chant of Celestial Illumination' causes his hair to turn cerulean and his voice to chime, and finally, 'Essence of Ethereal Flourish' surrounds him with shimmering butterflies. As sunset looms, Sunwoo delivers his final package to the notorious Miss Baobao, only to discover she orchestrated all the 'accidents' to teach him a lesson: true legends embrace experience and humility. He learns that the magical mishaps were temporary and designed to remind him that even the most powerful can learn from fieldwork, leading him to a deeper appreciation for life's unexpected wonders and his role as a legendary, yet grounded, Cloud Courier.