Upon hearing the knocking sound, the captain immediately sat up straight, staring at the door with a serious expression.
He made no movement and remained silent, just coldly staring at the door, his right hand already on the pistol at his waist.
If it was the police who had arrived, he would directly open fire and then make his escape.
Knock, knock, knock!
The knocking had a rhythmic pattern, starting with three long and two short knocks, followed by four short and three long knocks, and finally three very urgent knocks.
Upon hearing this, the captain finally breathed a sigh of relief, relaxing his guard.
It was the special knock code of their Blood Demon Mercenary Group, indicating that it was their own people outside the door.
He stood up and opened the door.
Standing outside was a foreigner with blonde hair, blue eyes, and fair skin.
