Walter White (Bryan Cranston) leads a mundane life as a professor of chemical high, who lives with his wife, Skyler (Anna Gunn) and his son, Walter Jr. (RJ Mitte) who has cerebral palsy. His life is complicated when diagnosed at stage three-terminal lung cancer. Walter decided to enter the illegal drug trade to develop a sufficient legacy for your family before succumbing to cancer. Use knowledge of chemistry to cook a very powerful methamphetamine (crystal meth) with one of his former students, Jesse Pinkman (Aaron Paul). The two try to sell their product at a drug dealer, “Krazy-8″, believing that Walter is a secret policeman and tries to kill him. Walter and Jesse manage to defend themselves, for kidnapping and murder Krazy-8 and his accomplice. Walter, deeply disturbed by the ordeal, severs all ties with Jesse. Upon returning home, Walter and his family discuss the long-term plans to treat cancer. While Walter originally want to succumb to their cancer rather than suffer the side effects of chemotherapy, her family finally convinces him to undergo treatment.
Walter was offered financial assistance from his brother-in-law, Hank (Dean Norris), a DEA agent and his friend Gretchen Rich, but rejected both offers. By contrast, Walter decides to return to the production of methamphetamine, and tells his family that the money was actually wins Gretchen. Walter convinces Jesse then must begin to sell their product to Tuco (Raymond Cruz), a provider of powerful drugs, but psychotic. The two begin to expand its operations for the theft of a large drum of methylamine, producing large quantities of methamphetamine Tuco. Walter begins to come to terms with their secret lifestyle, and creates the pseudonym “Heisenberg” to hide their identity.