Set during the Ming Dynasty, 'Under the Power' follows the cold and ruthless Lu Yi, an elite embroidered uniform guard (Jinyiwei), and Yuan Jinxia, a clever and sharp-tongued female constable from the Six Doors bureau. Initially at odds due to clashing personalities and competing jurisdictions, the pair are forced to work together when a case involving missing government funds on the Grand Canal arises. As they delve deeper into the conspiracy, they uncover massive corruption reaching the highest levels of the imperial court. Amidst the danger, life-threatening trials, and dark secrets of their pasts, a deep and enduring romance blossoms between the stoic guard and the spirited detective.