At the end of the Northern Song Dynasty, the situation was precarious. Lu Yanqing, the young kiln owner of Ru kiln, is famous all over the world for his unique skill of "the sky is blue after rain". However, his peaceful life as a craftsman was completely shattered by a secret order from a powerful minister - to burn a batch of tribute porcelain with hidden military maps in order to collude with the enemy and treason! On one side is the cold butcher's knife of the powerful minister, and the lives of the whole family hang on by a thread; on the other side is the loyalty and patriotism of the family and country, and the country of the Song Dynasty is in danger. Between the fire and the mud, Lu Yanqing fell into an unprecedented desperate situation. He must use his extreme wisdom and superb porcelain skills to navigate through the layers of murderous intentions between firing the masterpieces that have been handed down for generations and making the weapons of national subjugation, and make secret plans, just to make the conspiracy of national subjugation hidden under the azure glaze known to the world! Is this a peerless elegy for Ru Kiln, or a legend of wits that turns the tide?