“Guns and Talks” is about a quartet of assassins led by Sang-yeon (Hyeon-jun Shin), the oldest and leader of the group. His “gang” consists of Ha-yeon (Bin Won), his younger brother; marksman Jae-yeong (Jae-yeong Jeong); and former marathoner and hot-tempered triggerman Jung-woo (Ha-kyun Shin). The foursome lives in the same house in the city and commits assassinations on the side. Other than that, they’re four ordinary Joes. Actually, they’re quite shy ordinary Joes who considers themselves only performing services that are needed.