Nathalie and her friends, Kraig and Andie are in trouble. They’re called for interrogation by the evaluators in the Alien Busters institute. A mystery crime happened in a wheat field while they were off duty and Nathalie discovered something in the crime scene. Something that’ll change everything in the Arkad city. The citizens of the Arkad city are in danger of unknown predators. What Nathalie and her friends will do to solve this mystery?

Nathalie is an Alien Buster, a member of a team that kills aliens in the Adkad City on Planet Zelea- home for humans after Earth's destruction. Haunted by her parents' death in the field, she joined the Alien Busters Institute in order to carry on their legacy. While on a mission, she discovers an alien baby. How can she kill this enemy when she's formed a strong attachment, even if it's forbidden?