The story involves an intricate series of time-travel journeys. It begins with a young man speaking to the narrator, the Bartender, in 1970. The young man is called the Unmarried Mother, because he writes stories for confession magazines, many of them presumably from the point of view of an unmarried mother. Cajoled by the Bartender, the Unmarried Mother explains why he understands the female viewpoint so well: he was born a girl, in 1945, and raised in an orphanage. While a fairly ugly teenager in 1963, she was seduced, impregnated, and abandoned by an older man. During the delivery of her child, doctors discovered she was intersex, with internalized male sex organs as well as female sex organs. Complications during delivery forced them to give her a gender reassignment. The baby was kidnapped by a mysterious older gentleman, and not seen again. The Unmarried Mother then had to adjust to life as a man, despite an upbringing which left him unqualified for "men's" jobs; he had planned to get into space as a sex worker for male workers and colonists. Instead he used his secretarial skills to type manuscripts, and eventually began writing. Professing sympathy, the Bartender offers to take him to the abandoning seducer, whom the Unmarried Mother wishes revenge on. He guides him into a back room, where he uses a time machine to take them to 1963, and sets the young man loose. The bartender goes forward eleven months, kidnaps a newborn baby and takes it to 1945, leaving it in an orphanage. He returns to 1963 and picks up the Unmarried Mother, who was instinctively attracted to his younger female self and has seduced and impregnated her. The Bartender nudges him to connect the dots, and realize that the seducer, the young woman, the baby, and the time traveler are all him. The Bartender then drops the Unmarried Mother at an outpost of the Temporal Bureau, a time-traveling secret police force that manipulates events in history, to protect the human race. He has just created and recruited himself. Finally the Bartender returns to 1970, arriving a short time after he left the bar. He allows a customer to play "I'm My Own Grandpa" on the jukebox, having yelled at the customer for playing the song before he left. Closing the bar, he time travels again to his home base. As he beds down for a much deserved rest, he contemplates the scar left over from the Caesarean section performed when he gave birth to his daughter, father, mother, and entire history. He thinks, "I know where I came from—but where did all you zombies come from?"
Reference: https://goo.gl/iqyS6t
Click the following link to see the chronological order of events and understand better: http://goo.gl/iJ2Lvh
Click the following link to see the chronological order of events and understand better: http://goo.gl/iJ2Lvh


