On the first day that the Priestess became an adventurer, she joins three other rookie adventurers on a quest to save some girls who were kidnapped by some goblins. Despite being one of the weakest monsters around, the rookie adventurers fall for some traps that were set for them in the goblin cave, which leads to dire results. A goblin was about to attack the Priestess when a mysterious armored figure appears before her. The armored figure then mercilessly starts slaughtering the goblins and tells the Priestess that his name is Goblin Slayer.