The squad 1 of ZEU3 has been tasked with a mission to search and destroy underground lab #21. The squad is made up of Lawrence as the leader, Mary as backup, five fully armed soldiers, and two bombers. Lawrence's job is to lead the team, while Mary is there to provide backup if anyone gets hurt. The soldiers are tasked with searching the lab and collecting all the information while protecting the bombers while they plant the bombs.
On the day of the mission, a chopper arrives to pick up ZEU3's squad 1 and drops them off at the location of lab #21. Once they arrive at the lab's location, Lawrence and Mary get an eerie feeling almost as if they were sensing themselves. As soon as they entered the lab, they were horrified at the sight before them. The walls were covered with pulsating flesh, and it looked like it was alive. Mary couldn't contain herself and started vomiting at the sight.
The team saw a lot of zombie corpses and a mysterious liquid on the ground. The soldiers took samples of the flesh from the walls, the mysterious liquid on the ground, and the zombie corpses. The bombers were planting C4s to destroy the lab, and they collected all the documents and journals they could find. Just as they were about to leave and detonate the bombs, a scientist appeared out of a locker and begged them not to blow up his lab.
Lawrence refused and told the scientist to keep quiet and follow them back to the military base. However, the scientist refused and injected himself with a purple liquid, similar to the mysterious liquid they found on the floor. The team was stunned and didn't know what to do as the scientist transformed into a zombie-like creature with extraordinary strength