What is the plot summary of Once Upon a Time?

The poet compares a prior much simpler time when society was genuine and now there is a switch 2 ingenuity as people put on faces and pretend to be something their not much like our current society in which people just do that to get ahead.Society has moulded the persona into what it is;false.The father seeks to learn a lesson from his son who still has a sense of innocence and the roles are switch where the teacher is now the student because it would be expected that the father would be teaching his son the lesson.It is because his son is innocent that he can teach his father to be genuine again and "unlearn all these muting things" and change his father's perception or outake on life in which society has made him.He recounts his past as in a story once upon a time.Presently people wear faces like masks "homeface,officeface,streetface,hostface,cocktailface..." And they are ingenuine which is the main theme of the poem.He speaks about people not shaking their hands with their hearts while their left hand search his empty pockets etc..this all comes down to one point that the father wishes to become genuine again and wants to learn it from his son as the line concludes to his son: "once upon a time when I was like you"