Theory:

The poem "A Tragic Story" talks about a learned sage who lived years ago. The sage had a handsome pigtail that hung from the back of his head. But he was not happy with it because it hung from the back. He put in all the efforts and tried to bring it to the front of his face. He thinks a lot and comes up with different plans to change the pigtail's position. He finally thinks the mystery is solved when he comes up with the idea that he could turn himself around and bring the pigtail to his face. He tries jumping around in various positions and twists and twirls his body in a desperate attempt. But nothing worked, but it is impossible to bring the pigtail attached to his, to his face. The sage does not give up his attempt but continues with his attempt in spite of repeated failed attempts.
 
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The sage had a pigtail