At work, she's a renowned assassin. At home, she's a single mom to a teenage daughter. Killing? That's easy. It's parenting that's the hard part.

Jae-ho, who aims to become the number one in a crime organization, gets to build up trust with Hyun-su, an ambitious newbie in the prison. While they try to take over the organization after the prison release, their ulterior motives starts to emerge.

Yoon-Jung accidentally calls a stranger, instead of her boyfriend, and has phone sex with the unknown man. When Yoon-Jung's relationship with her boyfriend turns sour, Yoon-Jung meets Hyun-Seung, the stranger she had phone sex with.

Dreaming of changing the world, SEO Chang-dae takes part in KIM Woon-bum’s political campaign. To resist the current dictatorial ruling party, SEO adopts a very aggressive propaganda campaign, and it makes KIM become the strongest candidate in the opposition party. When ambitious SEO believes that unjustified means is necessary for politics, KIM has a firm belief that it is not real politics. While their conflict deepens, the ruling party secretly contacts SEO to win the next presidential election.