Walter White, a 50-year-old high school chemistry teacher in Albuquerque, works a second job at a car wash to support his pregnant wife Skyler White and their teenage son Walter White Jr., who has cerebral palsy. At his 50th birthday party, Walt's brother-in-law Hank Schrader, a boisterous DEA agent, shows off his gun and invites Walt on a ride-along to witness a meth lab bust. Walt accepts the invitation out of quiet curiosity, and during the raid he spots his former student Jesse Pinkman, a small-time meth cook, escaping through a window. The next morning Walt collapses at the car wash and is rushed to the hospital, where a doctor diagnoses him with inoperable Stage III lung cancer and gives him roughly two years to live. Walt tells no one about the diagnosis. He drives to Jesse's house and proposes a partnership: Walt will cook methamphetamine using his chemistry expertise, and Jesse will handle distribution through his street connections. Jesse laughs at the idea but agrees after Walt threatens to turn him in to Hank. Jesse purchases an old RV to serve as a mobile lab, and they drive it out to the desert to cook their first batch. Walt's chemistry produces an exceptionally pure product — 99.1 percent — far superior to anything Jesse has seen. While they celebrate, Jesse's former associates Krazy-8, a mid-level dealer whose real name is Domingo Molina, and his cousin Emilio Koyama arrive at the cook site, having followed Jesse. Emilio recognizes Walt from the DEA ride-along and accuses Jesse of working with a police informant. Krazy-8 and Emilio force Walt and Jesse into the RV at gunpoint and demand that Walt demonstrate the cook. Walt begins the process but deliberately creates phosphine gas, then runs out of the RV, jamming the door shut behind him. Emilio dies from the gas. Krazy-8 stumbles out alive but collapses unconscious. Walt, in shock, hears sirens approaching from a distant brush fire and drives the RV away from the scene with both bodies inside, crashing it into a ditch. He records a video confession and farewell message to his family on Jesse's camera, then raises a gun toward the arriving vehicles — which turn out to be fire trucks, not police.