The story deals with Moon Ikjeom, who, as legend has it, brought cotton seeds into the country in a brush cap. But the author departs from the narrow scope of the legend and places a wider focus on Moon’s life. Major historical events—such as the reform policies of King Gongmin of Goryeo, who endeavored to escape the interference of the Yuan Dynasty; the newly emerging power, which tried to build a new country, Chosun; the sudden attack of the Japanese military—are interwoven with imaginative fictional episodes, resulting in an exciting storyline.  

After Moon Ikjeom passes the state examination, he is ordered to travel with the new reformists who work with King Gongmin, to deliver a message to the emperor of Yuan. Moon Ikjeom, a newly designated secretary in charge of documents, embarks on a trip to Yuan with some other envoys. However, one envoy falls for the scheming of Deokheung and sides with Yuan, while Moon Ikjeom, who does not take part in the scheme, is sent away to Gyoji, as Vietnam was known at that time. 

This is where Moon Ikjeom’s fascinating adventures begin. When the guard who was accompanying Moon to Vietnam is killed by an alligator, Moon must do what he can to survive in the jungle. From this point to when Moon Ikjeom brings back cotton seeds, the author lets Moon break free from history and roam wild in his imagination.