Follow the transformation of Jimmy McGill (Bob Odenkirk), a former con artist who is trying to become a respectable lawyer, into the personality of the flamboyant criminal lawyer Saul Goodman.

Jimmy is inspired by his older brother Chuck to leave his Chicago-area conman past, when he was known as "Slippin' Jimmy". He initially works in the mailroom at his brother's Albuquerque law firm, Hamlin, Hamlin & McGill (HHM), where managing partner Howard Hamlin becomes his nemesis. While at HHM Jimmy befriends Kim Wexler, a fellow mailroom employee who completes law school and becomes one of the firm's associates, and their friendship later turns romantic. Jimmy is motivated by Chuck's success to finish college and complete a Juris Doctor degree through a correspondence law school, the fictitious University of American Samoa.