"The Hidden Secret" tells the story of Lin Yan, a scholar from a poor family who was involved in a shocking fraud case in the imperial examination. A "wordless book" that requires a potion to be revealed actually contains the next exam questions. He was forced to deal with the pursuit of the court and the coercion of mysterious forces, and gradually uncovered the conspiracy originating from the depths of the court. This is not only a battle of intelligence, but also the ultimate choice of morality and life and death.
