People are busy watching the screen. The person wearing a mysterious mask so called 'Gaetal' appears, and the Killing Vote begins.

Choi Kyung Seo is a legendary lawyer at the top law firm in South Korea. He has charisma and an attractive appearance. He hires Go Yeon Woo as a rookie lawyer for the law firm. Go Yeon Woo has excellent memory.

Do Il-Chool (Park Jung-Min) has a talent for playing poker and he is the son of Jjakgwi. His father was a gambler and had one ear cut off after he was caught cheating. Il-Chool meets mysterious gambler Aekku (Ryoo Seung-Bum) and gets involved in the master gambling world.

In 1920, when Korea is under Japanese rule the Korean Independence Army’s Hae-chul and his subordinates are carrying out the operation to deliver funds to the Korean Provisional Government in Shanghai. During the operation Hae-chul is reunited with Jang-ha, a young squad commander, whose mission is to defend Samdunja. They unite and trap the Japanese soldiers in Samdunja, soundly defeating them. Now they’re chased by Japanese troops and Hae-chul finds out that Jang-ha’s mission isn’t over yet. A crucial yet dangerous task is still assigned to him.

Ki Moo-Hyeok, a lawyer with a high winning rate, only cares about money. Due to a murder case at a high school which he deals with, his reputation as a lawyer hits rock bottom. To regain his good name as a lawyer, he sneaks into the high school and work as a temporary teacher. He tries to reveal a secret which the students have, and gets involved with Teacher Ha So-Hyun, a P.E. teacher who loves her students. They then face the students'secret.