The Seventh Dinner

At a family dinner for the fifth wedding anniversary, seven people sat around and six died of poisoning. The only survivor, Lu Chenzhou, woke up repeatedly in the interrogation room—— The same light, the same question, the same answer destined to lead to a dead end. On the seventh cycle, he finally remembered an overlooked detail: there was a pair of shoes that didn't belong to anyone. When his wife Su Wan said "Everyone is here", her eyes drifted towards the direction of the shoes. Everyone at the dinner table is lying. The real murderer is not the person sitting at the table. It's the person who shouldn't exist, but is tacitly allowed to appear by everyone.