Relinquish the throne

"Silence!"
The lobby was so quiet at this moment that you could hear a pin drop!
At this moment, everyone opened their eyes wide, looking at the five bodies lying on the ground, their eyes were dull and they had no reaction!
"Ah! Murder!"
After a long while, someone shouted, breaking the dead silence!
"A nice birthday party ended with blood?"
"What happened? How could someone suddenly die?"
"Are you sure this isn't a movie? How did the person die?"
The guests in the...