Amid widespread famine and empty granaries in the Great Yong Dynasty, Third Prince Xiao Yan uses his mother's jade pendant to travel to the modern world, where he meets Lin Zhixia, the owner of a grain and oil shop, and discovers that the two worlds are connected. He travels back and forth to transport food and save starving civilians, bringing modern rice into the imperial court and sparking suspicion and power struggles among the princes. During an unexpected incident while traveling between worlds, the emperor also arrives in the modern era. After witnessing its abundant supplies, the Crown Prince returns to the palace and mobilizes troops to stage a coup. Lin Zhixia drives through the passage between worlds and returns to the palace to stabilize the situation. Seizing the opportunity, the Second Prince eliminates the Crown Prince and sets his sights on the throne. With control of a food supply route across time and space, Xiao Yan remains devoted to the people and wins their hearts, setting the stage for an epic struggle involving court intrigue and journeys between two worlds.