i think the summary is that the mid-level antagonist is the dark hair guy in robes who gives orders to the low levels, like that one short hair fighter lady and the light hair spy guy who got his arm cut off. he has a boss who barely shows up. they have an unexplained annoying plan to "test" the 2 heroes. they have been doing these dumb attacks on the town or on the heroes.
the most recent attacks are ambushes on the male hero and the former assassin lady in the street, and an ambush on the female hero and her elf adventure friend in a public square. the male hero follows some leads and finds out the antagonist organization made a hidden lair to summon (?) monsters, might have been goblins, to attack the town. he goes there with the assassin girl and that's what this chapter is about.
the female hero and the elf girl, the elf girl gets kidnapped. the female hero follows the kidnappers and saves the elf girl. the mid level antagonist shows up and says some confusing stuff about his motivation? that was the previous 2 chapters.
i don't think the manga has caught up to the anime adaptation yet.