In the Rainbow Ink Sect, the path to immortality is written in vibrant, divine colors. Cultivators manifest their power by painting “Divine Scripts” in the air using elemental inks—Crimson for fire, Azure for water, and Gold for light. Jing He is “Chroma-Blind,” a youth whose spirit can only resonate with the color black. While his peers create dazzling spectacles of colorful power, Jing He is relegated to the “Shadow Archives” to grind soot into ink. However, he discovers an ancient, frayed brush that holds the “Original Ink”—the primordial blackness from which all light and color were born. As a reality-distorting fog called the “Vivid Delirium” begins to turn the world’s colors into lethal traps, the boy who paints in shadows must rewrite the foundation of existence.