In the 13th century, a princess named No Gu, a queen of the Great Mongol Empire who is visiting Korea as a queen, is overcome with longing for her homeland and flees from her emperor. She drowns while escaping. As she dies, she utters a single sentence, "I want to go home." The story unfolds in the present day. The princess No Gu, who went to Korea to work, is trafficked and imprisoned in the house of a cruel Korean woman. While imprisoned, she uncovers the terrible crime committed by the housewife, which leads to an interesting development.

Four friends who grew up in an orphanage promise each other that they will meet again when fate forces them to separate. Years pass, and they continue to live their own lives, but one day they find each other and fulfill their childhood dreams together.