The journey of plastic waste from everyday life in London to the ocean forms the core of this research. Inspired by the Great Pacific Garbage Patch, the work began with material experiments using recycled plastics, exploring their potential within fashion design. Over time, the focus shifted from outcome to process. By collecting domestic plastic waste, mapping the Thames and canal systems, and conducting local interviews, a continuous flow is revealed: plastic emerges from daily consumption, enters urban waterways, and ultimately reaches the sea, affecting coastal communities and fishermen. Plastic pollution is therefore understood not as a distant issue, but as a local and systemic condition. Moving beyond garment design, alternative forms such as installation are considered to express circulation, visibility, and responsibility within this urban–river–ocean network.