Park Chang Ho has been known since his school days as "Big Mouth" because he talks big and promises big things but can not follow through. He is also an infamous lawyer with a very low success rate who was hired by a mayor because of his incompetence. Unfortunately, he was framed as the notorious and mysterious swindler "Big Mouse" and sent to prison. Ko Mi Ho is Park Chang Ho's loving wife who works as a nurse. She has a strong personality and will do anything to prove the innocence of her husband and help solve the case the mayor has given to her husband. Will Ko Mi Ho be successful in proving her husband's innocence? Or will her investigations lead to opening a can of worms? (Source: I'M YourOnlyOne at MyDramaList)