Asian Drama

Park Chang Ho works as a lawyer with a measly 10% winning rate. He is a talkative person and, because of this people call him Big Mouth. He happens to get involved in a murder case and he is somehow fingered as genius swindler Big Mouse. Due to this, Park Chang Ho finds himself in a life-threatening situation.

Meanwhile, Go Mi Ho is Park Chang Ho’s wife and she works as a nurse. She has a beautiful appearance and a personality that is both wise and brave. She helped her husband become a lawyer by supporting him financially and psychologically. Go Mi Ho learns that Park Chang Ho is suspected to be the genius swindler Big Mouse and attempts to clear her husband's name.

A sexual scandal between a math teacher and a student in a prestigious high school ended in tragedy. 4 years later they meet again, now as adults, to reveal the corruption in school and to regain one's reputation as a teacher.

Ji Yoon Soo is a high school math teacher with a bright smile and a positive impression of others. She is a hard-nosed and stubborn person who has to push ahead with the decisions she has made. She is a math geek who loves solving difficult problems and teaches students to purely love math.

Baek Seung Yoo is emotionless and has no light in his eyes. He used to be a math genius who appeared on a quiz program at the age of five and surprised the world by solving college-level math problems. He was admitted to MIT at the age of 10 but dropped out at the age of 12, and suddenly disappeared.