In her parents' textile workshop, Louise learns all about flowers, animals, colors, and fabrics. She discovers that crimson comes from snails, yellow from plants, and black wool from sheep, but all life originates from the river. When her mother passes away, Louise decides to become a scientist. However, the blue, the color of the river from her childhood, "pinches her heart." Will Louise pick up the threads of memory and weave them into something truly special?.