Nam Sin abuses the manual mode and makes Namsin attack Chairman Nam. However, things don’t go as Sin has planned. Jong Gil overhears that Chairman Nam really does have dementia and tries to come up with another plan by pretending to help Nam Sin. Meanwhile, Young Hoon is furious that Nam Sin had tried to kill his own grandfather, and Laura becomes desperate as Nam Sin keeps going too far.
소봉을 향한 마음으로 남신Ⅲ는 수동제어모드를 극복했지만, 인간을 다치게 할 수도 있다는 사실에 트라우마가 생긴다.
한편, 폭주하는 남신은 서종길 이사의 도움을 받아 할아버지 건호를 몰아내려 하는데..