Heaven Dou City Tang Sect's underground headquarters was heavily guarded around the clock. Any irregularity would be detected immediately, and even at night, they did not let their guard down.
Not only did they not relax, they actually strengthened their defenses. In their view, if the enemy had to choose a time to strike, it would most likely be at night.
Thus, they deployed even more personnel at night than during the day. To them, this was a peaceful night.
Of course, there was no real distinction between day and night in this Underground Base. For all twenty-four hours, they relied on electric lights for illumination. Lights on meant daytime, lights off meant nighttime. They could only rely on clocks to determine the passing of time, knowing from the clock that the night was about to end.
It was now seven in the morning. Outside, the darkness should have just faded, and they had entered shift-change time. Those who had stayed up all night were exhausted and desperately wanted to go back and get some proper sleep, while those who had slept at night yawned, still carrying a trace of drowsiness.
"Alarm, alarm..." Just as they were changing shifts as usual and had found nothing unusual, the detection instruments in the main monitoring room emitted a piercing alarm.
This alarm would naturally trigger the other alarms, because when it sounded here, it meant that a person or object capable of inflicting massive damage on Tang Sect Headquarters had been detected. The entire headquarters had to be placed on high alert.
The expressions of those who were awake changed upon hearing the alarm. Those who were asleep jolted awake and sprang to their feet like lightning. Just as they were about to respond, the entire Tang Sect Underground Base began shaking