Professor Se Jeong suddenly finds herself trapped in the middle of a deadly catastrophe during a major biotechnology conference. After a rapidly mutating virus is accidentally released, authorities immediately seal off the entire facility to prevent the outbreak from spreading beyond its walls. As the infected begin undergoing horrifying transformations, Se Jeong and a small group of survivors are forced into a desperate fight for survival. With danger growing by the minute and escape becoming increasingly difficult, they must work together to stay alive before the terrifying nightmare consumes everyone inside.