On a peaceful afternoon, Mikoto's cell phone suddenly rang, and a text message from an unknown number broke her tranquility.The sender was signed “Shirai”, a name she was not familiar with.The text message included a live broadcast link, which simply read: “Challenge you, Mikoto.”

Mikoto opened the link in confusion, and a man wearing a black hood and face covering appeared on the screen. He called himself “MurderS”.Behind the man was a body covered in white cloth, and next to him stood a terrified-looking teenager, whom the man claimed was hostage X.

“Mikoto, you need to determine the cause of death of this body within a limited time.”The man said coldly, “If you answer wrongly, hostage X will pay the price.”

The corpse Y in the picture looked particularly strange. Meiqin could not catch many clues from the blurry quality of the live broadcast.She felt a chill running down her spine. This was obviously a targeted provocation, and her wisdom and courage would be the only hope to save the boy.

Nakado, Mikoto's friend, learned about this and thought it was a trap, and strongly advised her not to fight.But Mikoto knows very well that once she retreats, not only the lives of the hostages will be threatened, but more innocent people may also be in danger.She decided to take up the challenge and use her professional knowledge to uncover the truth about this mysterious death.

Time was running out, so Meiqin began to analyze every detail of the live broadcast.She noticed that the hands of body Y were placed abnormally, which seemed to indicate a certain cause of death.At the same time, subtle sounds and smells in the background of the live broadcast may also be the key to solving the case.

However, as the investigation deepens, Mikoto discovers that the incident is far more complicated than she imagined.The scars on body Y, the stains on the clothes, and the subtle reaction of hostage X all point to a larger conspiracy.She realized that this was not only a contest of knowledge and courage, but also a life and death game against time.

As the live broadcast continues, Mikoto must solve the mystery as soon as possible, otherwise the lives of the hostages will be in danger.