After the mutilated body of a missing girl is discovered in the tidelands of Incheon, rivals Han-su and Min-tae, are in charge of finding the culprit. Things take a dark turn when Han-su meets an informant who insists he knows who the murderer is. As cover-ups and secret deals ensue, tensions rise between the two detectives as the pressure of solving the crime is shaking up the Korean peninsula.
