Kharkov is Yukolun's second-largest city and also the hometown of General Sergey.
Ever since the Star Alliance Country's laboratory appeared here five years ago, mysterious contagious diseases such as anthrax and the plague have frequently erupted.
Recently, a strange cold broke out in the barracks, infecting over 200 soldiers, and as of now, dozens have died.
No wonder Sergey was so furious, as this was his hometown and the place of his rise, yet it had become someone's testing ground.
Biological laboratories are fraught with dangers; any viral leak could lead to catastrophic losses.
Therefore, the Star Alliance Country despicably built it abroad, so even if an accident occurred, it would be someone else's disaster, occasionally allowing for an "accidental leak" to gather data.
At this moment, Lu Yao was riding the Spiritual Sparrowhawk, overlooking the Star Alliance Country's fourth-level biological laboratory from high above.