Ok so far this is what I think is happening.
Originally, Jung Hwang Ji and his mother were normal humans. But when the surgeon vomited into Jung he turned into a planetary human. Some where along this process is mom got replaced/taken over by another planetary human civilization. (Only reason I say this is because in ch 1, his mom seems normal but afterwards she is cold and emotionless). After this point the Mom only sees Jung as a resource to be safeguarded until I guess she can use him. Why/How she'll use Jung I'm not exactly sure, maybe it has something to do with declining civilizations and the fact that a planet needs to steal resources from another in order to survive.
Jung's body meanwhile is undergoing an incredible transformation and houses an extremely advanced civilization. His body is the one with the laser bots and futuristic looking shit. They annihilate the invader and invade the attacker's (the cop) body. Once there, what they thought was a backwater uncivilized body is actually a civilization that has collapsed and is past its golden years, and they realize there probably aren't any resources worthwhile invading for. Unfortunately, they lose their main attack force in this process.
Hopefully, Jung's body is strong enough to withstand his mom's attack when ever she decides she needs the resources.