Lee Ho Cheol is a regular firefighter. When news begins to surface about a serial killer, He Cheol is approached by a stranger who informs him that his neighbor, Kwon Shi Woo, is the likely culprit. Unbeknownst to Lee Ho Cheol, that stranger is a contract killer. Soon Lee Ho Cheol finds himself dangerously caught between the two. (Source: MyDramaList) ~~ Adapted from the novel "Superior Day" (우월한 하루) by Team Getname (팀 겟네임).