In the future, the world ends quietly. A man wakes up one day and realizes his wife is not responsive. He tries to revive her through mouth-to-mouth resuscitation, but fails. He sees his daughter in her bedroom, and he tries to revive her too, but fails. He deduces that the world has ended. He does not know how or why the world ended, but he knows he is alive.
He breaks into the neighbor's house and finds his neighbors unmoving in their beds. He remembers numerous details about their life as he stares down at their bodies, such as their gift for growing tomatoes that he and his wife loved to eat. He leaves the house and goes to his job delivering packages. He keeps driving until his truck runs out of gas, and then he abandons his truck.
He takes shelter in the nearest home, a nice, two-story brick house. He wakes up the next morning and realizes he has no where to go, so he stays. He digs a grave for the dead residents at the house. He resorts to drinking.
A day or two later, the power goes out, and he runs out of liquor. He robs a store.
After living in the house for two weeks, he wakes up to sounds downstairs. He goes downstairs and sees a woman. He tells her where a bed is. He does not ask her to leave. They don't talk at all.
After a while, the woman propositions him out of a sense of obligation to promote the survival of the human race. He declines. When she despairs, he recommends she drink more alcohol.