Jung_E portrays a desolate Earth rendered uninhabitable by climate change-induced sea-level rise. Humanity relocates to space, establishing 80 shelters between Earth and the Moon. However, shelters 8, 12, and 13 form the Adrian Republic and wage war against the Allied Forces, leading to decades of conflict. Captain Yun Jung-yi, a legendary mercenary, becomes a pivotal figure in the Allied Forces’ efforts.
After a failed mission leaves Captain Jung-yi in a coma, her brain is cloned by the Kronoid institute to develop an AI mercenary named Jung_E. Thirty-five years later, her daughter, Dr. Yun Seo-hyun, leads the project aiming to immortalize her mother’s legacy. As peace looms and the project’s purpose shifts, Seo-hyun faces personal challenges and ethical dilemmas, culminating in a daring escape with the Jung_E robot, symbolizing hope and resilience amidst a war-torn humanity.