The episode begins with Goblin Slayer and his party meeting a client who has a goblin problem. The client provides them with information about a mausoleum where goblins have appeared. The team also learns that a previous group of adventurers, consisting of various ranks and classes, went missing in the same area.

Upon arriving at the mausoleum, the group lines up in three pairs of two, as suggested by the Priestess. They proceed cautiously, aware of the dangers of traps and ambushes. During their exploration, they encounter a group of goblins. The party successfully defeats them, though not without some tension.

As they delve deeper, they discover a captive adventurer from the missing group. The young Wizard in the party wants to free her but accidentally triggers a trap. They manage to escape and fend off more goblins.

Then, the group comes across a troll, a creature not usually found in goblin nests. Goblin Slayer employs a clever tactic to defeat the troll. Although the young Wizard is initially impressed, he grows frustrated by Goblin Slayer's nonchalance in killing the troll compared to his enthusiasm for slaying goblins.

After successfully completing the quest, the group returns to the guild. They celebrate their victory, but the mood is tense. The young Wizard reveals that his older sister was killed by goblins, explaining his deep hatred for the creatures and his resentment toward Goblin Slayer.

The episode ends with Goblin Slayer being approached by another adventurer.