Lina and the gang split in two diffent groups, Xellos, Amelia and Zelgadis in one, while Lina, Gourry and Filia in another. They need to explore two different cities at the same time that seems to be holding magical vessels. The two countries, Alto, and Bantone hate each other, and Lina and the group experiences their daily cannon ball fight against each other.
We find out that the King's daughter of Alto, Sera, had befriended and fallen in love with the Queen's son of Bantone, Marco. Both sides, approach each group and they have a plan on stealing the magical vessels. As they do that in the middle of the night, both sides is alerted somehow.
They all head for a tiny island that seems to be in the middle of the sea that is blocking them, and each city heads there too. Wait there is even more... creatures show up wanting to take the magical vessels what will Lina and the gang do next?
A la recherche de la 5ème arme, nos amis vont se retrouver à Alto et Baryton, deux villes qui se font la guerre.
Die beiden Königreiche Alto und Bariton liegen seit Jahren im Krieg wegen zwei magischen Gefäßen. Die Tochter des einen Königs bittet Lina und ihre Freunde, ein Gefäß zu stehlen und es mit dem anderen zu vereinen, um dadurch den Krieg zu beenden. (Text: Premiere)
Lina y la división banda en dos grupos diferentes, Xellos, Amelia y Zelgadis en uno, mientras que Lina, Gourry y Filia en otro. Que necesitan para explorar dos ciudades diferentes al mismo tiempo que parece ser la celebración de vasos mágicos.
リナたちはガウリイの持つ「光の剣」を始めとする、ダーク・スターの五つの武器を探す旅に出た。訊き込みで得た情報ではアルト国とバリトーネ国という犬猿の仲である国がそれぞれに魔道器が保管されているらしい。二手に分かれて魔道器を手に入れようとするが、リナたちは両国の争いに巻き込まれてしまうことに…。