The conflict between Walter (Bryan Cranston) and Jesse (Aaron Paul) made them understand the danger and bloodiness of the drug industry, and the death of Tuco also made the "master and apprentice" lose their only shipping channel. In an instant, Walter fell into a dilemma of having goods but no sales. Jesse decided to expand the sales channel through his friends. Although he gained a lot in a short period of time, the accidents that followed made Jesse understand that this was not a long-term move. The relationship between Walter and his wife Skyler (Anna Gunn) began to become more and more tense, and Walter's improvement in cancer brought a glimmer of hope to their relationship. Jesse met a landlady named Jane (Krysten Ritter), and the two gradually fell in love, but Jane was once a "drug addict". What will happen to her fate when she is with Jesse?