Some time after the battle with the Lady Bone Demon, life has seemed to have gone back to normal for MK and the others, as he and Mei manage to take down Jin and Yin as the brothers attempt to attack the city. However, something has been rather off about MK ever since the Lady Bone Demon's defeat, and things only get more unsettling as he and Monkey King discover something from Sun Wukong's past that comes back to haunt him and everyone else.
Tropes:
- Cerebus Syndrome: Discussed by MK, as he suggests that this could possibly be the point where the group's adventures start to become Darker and Edgier.
- Downer Ending: What starts with MK defeating another Monster of the Week and showing how far he's come as Monkey King's protege ends with him accidentally releasing another threat in the form of a mysterious scroll containing malevolent ink creatures, which captures Monkey King and nearly takes MK before he just manages to escape.
- History Repeats: Each season has MK face Monkey King's old foes or rivals, only to accidentally give them a means to attack the city before their eventual defeat. He does so again here.
- Time Skip: It's been at most a few months since Lady Bone Demon's defeat, which MK is still feeling the emotional consequences of.
