Killer Seo Yi-do breaks into Heo Dong-hwa's house, confines him, and searches for a cell phone containing the mayor's corruption scandal. Meanwhile, Heo Dong-hwa's friend and police officer, Chu Tae-jung, pays an unexpected visit, leading to an unwanted short cohabitation. Amidst this, subtle emotions begin to sprout between the two, while an incident intertwining all three of them unfolds.