In another time and place, Son Hak and the dragons banter as they hold a drinking contest. As they start to doze off one-by-one, Zeno dreams of his past, where his abilities and experiences, both as a person and as the Yellow Dragon, are revealed.
The gang has a drinking competition around the campfire, in which Jae-Ha eventually wins by default. During that night Yona almost tell Hak that she likes him. A flashback reveals when Zeno first became the yellow dragon warrior, but he feels useless on the battlefield with King Hiryuu, who is the crimson king, and the other original dragon warriors. Gu-En is the first white dragon warrior, Abi the first blue dragon warrior and Shu-Ten the first green dragon warrior. Although Zeno possesses no combat skills, he has the power to heal very quickly. When Zeno demonstrates his power, King Hiryuu is shocked by this and gives him the crest bestowed by the dragon gods themselves. King Hiryuu and the dragon warriors are feared and targeted by more humans, who either perished or retreated due to the powers of the dragons. After King Hiryuu rests in peace, Gu-En, Abi and Shu-Ten give a heartfelt farewell to Zeno, who stays to look after the castle. As Gu-En, Abi and Shu-Ten disperse their separate ways for twenty years, Zeno realizes that the other three have died due to aging. Zeno takes out an entire army by himself as he mourns the death of his friends.
Zeno leaves the castle to track down the descendants of the dragon warriors. He is shot with a bow and arrow by some archers, and he wakes up in a hut to a girl named Kaya. She reveals that she has a contagious disease, hence why she lives in a secluded area. Since Zeno cannot get ill, he spends time with her and takes care of her. He eventually asks for her hand in marriage, and she cries in response. Overnight, Zeno holds Kaya's hand as she dies and rots. After many years, Zeno sets out to find the descendants of the dragon warriors for the sake of King Hiryuu. Zeno visits the villages of the dragon warriors, meeting a four-year-old Kija after he bathes, meeting a two-year-old Shin-Ah while playing with a ball and meeting a nine-year-old Jae-Ha sleeping while shackled at his wrists and ankles. In the present, Zeno wakes up in his tent to his friends and gives them a group hug, making them uncomfortable. Since Yoon opted out of the drinking competition due to doing various chores, Jae-Ha forfeits his win to Yoon, with no objections from the others.