In an ordinary high school in New Mexico, Walter White lived an ordinary life.As a chemistry teacher, he faces experimental benches, test tubes and a group of energetic students every day.However, beneath this ordinary appearance, there is an extraordinary story hidden.

Walter was once a top student in the field of chemistry, and his research results even missed the Nobel Prize in Chemistry.But out of his desire for an ordinary life, he chose to give up the path of scientific research and become an ordinary teacher.However, fate struck a heavy blow when he least expected it.

When the doctor told him that the shadow of late-stage lung cancer had enveloped his body, Walter's world collapsed instantly.Not only does he have to face the countdown to his own life, but he also has to think about how to protect his family's future life.At home, the pregnant wife in her forties and the son with mild cerebral palsy were their family's most precious treasure and the deepest concern in his heart. Walter knew that he was the financial backbone of the family.