Alba the fish has spent her entire life collecting precious objects that drift down to the ocean floor. From delicate shells to brightly coloured coral, each year on her birthday she gathers one more precious item. But over the years, Alba notices her collection is losing its sparkle and that the world is changing. What are these bits of plastic and metal? As the coral reef fades, Alba decides to leave her home behind. Can an old fish teach the world how to bring colour back to the ocean?