After leaving Eden, Leo Mycenae returns to guard his temple, where Wolf Haruto and Lionet Souma arrive promptly. The young Saints find themselves to fight their way through the Leo Temple, but the ferocious Mycenae proves an almost impossible to overcome obstacle, even when the two teenagers fight him together. In desesperation, Haruto risks his life by stopping Mycenae's final attack. The fierce determination of the young Saints makes Mycenae reminisce about his past and his pupil Eden, and deeming them true Saints, allows them to go through the Leo Temple.