Gou has vowed to find the legendary treasure of Salamander. In his search, he meets Ren, a fairy who is looking for the four treasures of Heart. Gou's childhood friend, Mari, is frustrated by Gou chasing after treasures, but she befriends another fairy, Rin. Gou and Ren's treasure hunt interferes with a secret project led by Mari's father. It turns out that Salamander is not what Gou originally thought it was...