Before dawn.
The raging storm from last night seemed as if it had never existed, leaving the entire city in utter silence.
Black rats freely rummaged through the collapsed trash cans, the putrid stench flowing along the gutter, passing through dark alleys, dirty water draining into the sewers.
As of the darkest moment before dawn had passed, the edge of the sky had gradually turned pale.
This block was cordoned off by the police.
At the depths of the alley, a rust-streaked iron door was tightly shut, with no sound coming from within, nothing but dead silence, only a mood of extreme oppression spreading.
Officer Zhang kept her head lowered, pacing back and forth in the alley.
After waiting for quite a while, she finally grew impatient and lifted her head with an eerie look toward the silent iron door.
"Open the door!"
She said in a sharp voice.