After a Lower Rank devours an American diplomat, the United States Bureau of Investigation sends one of their most promising agents to apprehend the suspect behind the slaying. Nearly losing his head upon arrival, Joe Caldwell's hopes of another easy investigation are shattered, and he begins his descent into a seemingly bottomless rabbit-hole. (Begins in Final Selection Arc)

After a Lower Rank devours an American diplomat, the United States Bureau of Investigation sends one of their most promising agents to apprehend the suspect behind the slaying. Nearly losing his head upon arrival, Joe Caldwell's hopes of another easy investigation are shattered, and he begins his descent into a seemingly bottomless rabbit-hole. (Begins in Final Selection Arc)