One day, the butler of the Sherwood family gives the girl Olsa an “Amber Brush” for Christmas. It looks like a regular paint brush. But the more Olsa peers into her, the more unusual she sees. Strange things begin to happen around the girl. And having accidentally met another girl, Aisa, they decide together to find out what kind of magical thing they gave to Olsa. After some time, the mysteries become more and more, and then an astrologer named Bootes appears. He tells the girls the story of the origin of the Amber Brush, and says that it must be returned, otherwise there will be a big war. Well, the girls go on an adventure to save many lives.