Breaking Bad season 4 continues to follow former Chemistry teacher Walter White and his assistant Jesse, a boy with unique talents in Chemistry, who use their knowledge and skills to produce methamphetamine. New season begins with partners being held in the laboratory. Now they are waiting for Gus' reaction to Gale's murder. Meanwhile, Skyler is trying to find her missing husband while keeping everything secret from Walter Jr. Hank keeps fighting for life after getting injured. Walt buys and carries a gun in order to kill Gus but a different person shows up at the lab instead of him. Mike tells Walt that he shouldn't even try to look for Gus. Jesse wants to distract himself from Gale's murder and throws a days-long party at his place.