A huge light shines down from the clouds and beams down into the ocean killing all the fish that land ashore in large numbers. News of this oddity reaches the team, who are dispatched to this remote island off the southern coast of the Korean peninsula.
Secret Investigation Record is based on cases detailed in the Annals of Joseon History with a bizarre twist; these incidents incorporate mysterious, supernatural elements that cannot be explained through science. Kim Hyung Do is an inspector of the state whose single-minded focus on his investigations into administrative misdeeds bring him into direct contact with these strange mysteries. Heo Yoon Yi is a government employee who aids him and attempts to understand these scientific impossibilities with an open mind, in contrast to his cynicism.
