Park Jeong Hwan is a guardian of the law. One day he learns that he is terminally ill and has but three months to live. To use his time and die without regrets, he decides to face Lee Tae Jun, for whom he has worked for the past seven years and who now runs for presidency. He is determined to reveal the corruption that Lee Tae Jun was involved in. To his surprise, not only rivals of Lee Tae Jun come to help him, but also his own former wife from whom he is divorced. Aside from wanting to reveal the corruption, she also wants to make up for the time they lost and correct the mistakes of the past.