Sinopsis :Lina and company refuge in abandoned home, where they plan out what to do with Rezo. Gourry asks why don't Lina use her Giga Slave that killed Rezo, but Sylphiel objects, saying that one wrong move could not only kill them, but destroy the world!
They travelling onto Rezo's lab, but are caught in the middle by a fish man, Rahanimu, sent by Eris. Gourry and Sylphiel get split up with Lina, Amelia, and Zelgadis who are fighting Rahanimu and other creatures.
Zangulus shows up and picks a fight with Gourry. He almost killed Sylphiel, but Gourry manages to hit him in a sensative spot that makes him retreat.
Meanwhile, with Lina, she can't defeat Rahanimu. After Zelgadis kills the other creatures (with no help from Amelia after he told her to get out of his way) with a fireball, he kills Rahanimu with a swipe of his sword. Lina thanks him, and Zelgadis comments how he just used his brain.
They make it to Rezo's lab, where Rezo is waiting for them...