There was a murder case in City A.
Top star Qin Hui was killed mysteriously.
The famous science fiction author Tao Ruan was killed.
Jiang Shu, a civilian full-time housewife, was killed
...
What they all have in common is that they all have a rhombus-shaped sharp topaz on their chest.
The police have no clue about the case.
Until one day, the wife of the person in charge of the investigation revealed some flaws.
People. Who killed it.
Still. They all committed suicide.
Intention: None
