An unexpected spring rain severely damages the silk for wedding garments, whose wedding date is drawing near. To keep a promise and recover the lost dyeing technique of "Chunting Blue," the people of the dye house search for answers step by step, from old color samples and willow branch ash to river water and heat control. Through repeated trial dyeings and failures, past emotions also grow close again as they solve problems side by side. In the end, the damaged silk reappears with an elegant spring green, and traditional dyeing arts are able to be continued. The story shows the power of persistence, responsibility, and mutual support, and also conveys positive values of cherishing craftsmanship, keeping promises and taking responsibility, and facing difficulties with a down-to-earth attitude.