Lena Ha is a beautiful and tough girl who is the captain of the kendo team. She meets Hye-Min Kang, the son of the president of a big company in Korea, and the two seem to fall in love at first sight. But when Lena learns that she and Hye-Min are half-siblings, she runs away and falls into a strange body water. When Lena wakes up, she finds herself in a strange kingdom...and learns that she may be its only hope. Now Lena, disguised as Ley, is ready for many adventures.