A high school teacher finds out he has cancer and decides to become a drug dealer.

Their first aborted drug deal leaves Walt and Jesse to dispose of a pair of corpses, while Skyler suspects that her husband is up to no good.

As Walt cleans up the mess that was left following his first drug deal, Skyler’s getting too close to the truth about his double life forces him to consider telling her the truth about his illness.

Being forced to reveal the truth about his illness leaves Walt facing the prospect of how to pay for an expensive series of cancer treatments.

Skyler organizes an intervention to persuade Walt into accepting his former research partner’s generous offer to pay for his cancer treatments.

As the side effects and cost of his treatment quickly mounts, Walt’s demand that he find a wholesaler to buy their drugs lands Jesse in trouble with a hardened ex-con.