Set during the end of the Goryeo period to the early Joseon period. Two friends aim their swords against one another due to differences in opinion about "my country."Set during the end of the Goryeo period to the early Joseon period. Two friends aim their swords against one another due to differences in opinion about "my country."Set during the end of the Goryeo period to the early Joseon period. Two friends aim their swords against one another due to differences in opinion about "my country."