This case study is to embody the birth of a beautiful goddess out of seashells in a contemporary fashion design collection, on the basis of the mythology of The Birth of Venus. The main theme attempts to reinterpret the image of the goddess of love and beauty and express the organic vitality of seashells and oceanic feelings by swirls in motion. To accomplish this, three dimensional silhouette of layered forms of voluminous outer and fitted inner is applied to design ideas with spiral curves. The opposite texture of something sculptural and transparent versus smooth and shiny is used to express the layered structure of seashells with the delicacy of goddess. Neutral colours and different tones of pink appeal to oceanic feelings and feminine emotion in a modern way. Various techniques by the geometric simplicity of flat patterns and pleating with boning are also performed to express the vital movement of organism. Throughout the whole process of this case study, the conceptual idea of Swirls in Motion - a goddess and seashells is reinterpreted to a contemporary fashion by personal and creative design development process. In particular, it is evaluated by the process of primary researches, various design developments and experimentations to the main theme.