On a stormy night, Su Yueqing, a popular female writer of mystery novels, died strangely in her apartment. Before her death, she left behind her last mystery work—"Letter", and at the same time, she also made an incomparable Weird will. The will stipulates that if you want to inherit her inheritance, you must guess the real murderer in "The Letter". Under the temptation of a huge inheritance, everyone turns their attention to "The Letter" in order to obtain the favor of fate, but Unexpectedly, this will has the magic power to kill people! All those who coveted the inheritance have died one after another...