This drama is the prequel of "Breaking Bad" and tells the story of lawyer Saul Goodman. This drama adopts non-linear narrative. When Saul Goodman first appeared, he was not called Saul Goodman. His name was Jimmy McGill. At that time, he was just a small lawyer working with investigator Mike to support his family. This drama will describe the whole process of Jimmy's transformation into Saul Goodman.