With a large amount of money involved, the detectives split up into different alliances to help three chaebol sons find the will of their late father. One of them is revealed to be Sergeant Kim Min-jae, who has been distancing himself from the family out of shame. While on the way to one of their missions, he discloses that K’s autopsy report shows that he had died of poisoning long before he was stabbed, implying that someone else had murdered him.