Solve the Case; I'm Serious!

The moonlight is gloomy, and the people and the earth are sleeping. The streets of Huadu have become quiet. Only sanitation workers in orange overalls are waving brooms to clean up the city's dirt. At the five o'clock shift in the morning, at a late-night snack stall on the corner of Ladies' Street, two young lovers were drinking mutton soup and eating multi-grain pancakes. Suddenly a shrill scream echoed through the street corner. I saw a person stumbling towards me from the end of the street. It was a woman, wearing a well-tailored professional suit with bloodstains all over her clothes. The woman seemed to be enduring some kind of huge pain. She walked towards the breakfast stall and shouted angrily; "Help... Help..." The moment the two young lovers raised their heads, their eyes suddenly bulged with fear and they were speechless. The late-night snack owner backed away even though the mutton soup in his hand was scattered all over the floor. A moment later the entire night sky... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.