"The Slayers Try" is the third season of the "Slayers" anime series, continuing the adventures of Lina Inverse, a powerful and brash sorceress, and her companions. The story begins with Lina and her friend Gourry Gabriev, a skilled swordsman, encountering a mysterious girl named Filia Ul Copt. Filia, a dragon priestess, seeks their help to stop a group of dark sorcerers known as the Dark Star, who aim to resurrect the ancient demon lord, Valgaav. Valgaav, a former servant of the demon lord Shabranigdo, seeks revenge against the dragons for their role in his master's defeat.

As the group travels, they are joined by new allies, including Xellos, a enigmatic and manipulative Mazoku priest who often operates with his own hidden agenda. The journey takes them across the continent, uncovering the history of the Dark Star and their connection to the ancient war between dragons and demons. The narrative delves into themes of betrayal, vengeance, and the cyclical nature of conflict, as the characters confront their own pasts and motivations.

The plot intensifies as the Dark Star successfully revives Valgaav, who reveals his plan to destroy both the human world and the dragon realm. Lina and her companions must navigate complex alliances and rivalries, particularly with Xellos, whose loyalty remains ambiguous. The climax involves a series of battles, culminating in a confrontation with Valgaav. Lina, utilizing her immense magical power, ultimately defeats Valgaav, but not without significant cost and emotional weight.

Throughout the series, the dynamic between the main characters remains central. Lina's fiery personality and Gourry's laid-back demeanor provide both comedic relief and moments of genuine camaraderie. Filia's struggle with her dual identity as a dragon and a priestess adds depth to her character, while Xellos' unpredictable nature keeps the group on edge. The narrative balances action, humor, and emotional stakes, maintaining the tone established in previous seasons while expanding the lore of the "Slayers" universe.