The "mad dog" detective from the Zhongnan Police Station who will be doomed if he is not careful.Detective My Way, who was born in a poor family and had only toughness and ruthlessness, became angry due to corruption. Park Young-han, an alternative detective who was as uncompromising as a bull's horns, appeared and changed his life as a detective.The growth story of "Kim Sang-soon", who overcomes various adversities with Detective Park Young-han and becomes a free and self-respecting detective, will become another highlight of this drama.