Lena Ha is a beautiful and tough girl who serves as the captain of the Kendo team. She meets Hye-Min Kang, the son of the president of a major Korean company, and the two appear to experience love at first sight. However, upon discovering that she and Hye-Min are half-siblings, Lena flees and falls into a mysterious body of water. When she regains consciousness, she finds herself in a strange kingdom... and learns that she may be its only hope.