The team was sent to an abandoned research facility where suspicious, unidentified research records were discovered. After searching in divided groups, surprisingly, there were no results other than traces of homeless people living there and some stray cats. Just as everyone gathers to return to base, a sudden, intense dizziness and nausea surge. It's gas. It had been spread throughout the entire facility. Eventually, one by one, they lose consciousness. When they begin to come to, what they see is... their teammates, now the opposite gender.