tl;dr:
Bojing and his crew go to explore a monastery which has been transformed into a place of human trafficking. Walking in the front door, Bojing saw a woman on a bunk and Nar Nutang yelled that the woman on the bunk was a shape-changing monster and Bojing listened and killed the woman but the woman wasn't a shape-changer but a real slave.
Bojing and the crew saw some ""MONKS" and a merchant; Bojing, a powerful baghatur, stuck fear into the monks' hearts forcing them to run. The slave merchant's two powerful bodyguards remained, one with the abilty of shooting meteorites the other a powerful warrior that the mighty Bojing even struggled with but the crew defeated the bodyguards and recovered the keys to rescue the slaves.
"AKSHULLY":
When Bo-jing learned from Ryu that innocent people were being pressed into slavery in the shadow of the Kanbaliq's walls, his heart hardened against the Emperor. He promised Ryu that we would cleanse the monastery of this wickedness, free the enslaved people, and one day depose the cruel despot who misused his power in this way.
Beatriss knew about the monastery and its ugly secrets. Besides the corrupt monks who received captives from the outskirts of the empire and beyond, Beatriss warned her new protege about shape-changers and a lizard that turned people to stone. After her months-long absence from home, Beatriss herself would return to the Happy Valley. Based on these warnings, Bo-jing and Nar Nuteng both bought mirrors.
Based also on Beatriss's advice, Bo-Jing, Nar-Nuteng, plus their sometimes associate, sometimes rival Bangqiu, along with Ryu and Bo-Jing's men-at-arms, entered the monastery through a secret door and based through several halls so long ruined that their original purpose was impossible to know. They encountered a horde of undead creatures whose chilling touch caused temporary paralysis. None of the party was lost in this encounter, but Bo-Jing elected to choose another entrance to gain access to the actual monastery.
Bo-jing led the party in breaking into the stables. There, the party encountered a group of monks whom were so terrified at the sight of the fearsome baghatur that they fley in terror. A woman who had been hiding in the loft space peered down. "Who is there?" she called. "Who will save me from this place?" Something about the young woman's helplessness put Nar-Nuteng on edge and she warned Bo-Jing of the seductive shape-shifters. Bo-Jing charged up into the loft area and angrily killed the too-good-to-be-true ingenue. She screamed and bled and died and her body did not revert to a gray, alien form. She was not a monster but a true victim, killed by the one she thought would rescue her.
Bo-Jing was despondent and blamed Nar-Nutang. Bangqiu rebuked him for being too emotional. But Ryu patiently explained that he alone was responsible for his mistake and that he must accept it and learn from it and give his focus in the moment to rescuing other slaves.
The party found their way into a series of tunnels dug under the monastery and inhabited by disgusting ant-men. With the power of his magic coin, Bo-Jing drove away the ant-men and the party navigated the labyrinth to arrive at the lair of the resident slave lord, a greasy-looking man in leather armor. While contending with a dozen cowardly monks and several ferocious giant weasels, the slave lord escaped. Rifling through his belongings, they found some useful information about the work of the slavers including contacts in other cities.
The party continued to explore and discovered a series of cellblocks, where they encountered a group of monks negotiating with a merchant sought to purchase and enslave a number of the people imprisoned there. Alarmed by the heavily-armed intruders, the monks and the merchant were put to flight while the merchant's bodyguards stayed in place to guard his retreat. A blast of steam from Bangqiu killed one of them while Bo-Jing defeated and slew the other in trying hand-to-hand combat. A search of the surrounding storage rooms located the keys and the party freed about a dozen prisoners. These people, mainly young women from Southern Zhou were glad to leave the monastery but feared being left alone in a city where they would be regarded as enemies. Bangqiu suggested that they should be taken all the way to the Happy Valley and resettled there.
