Alis is a young girl whose brother Nero was brutally killed by a mysterious man known as Lassic. Nero's last words were: "Sister, find a warrior named Odin, he can help you to defeat Lassic!" Now Alis' dangerous adventure begins. Her first task is to find Odin. Then, with help and support from her friends, Alis will have to stop the evil Lassic and to save the world.