The new fighter jet "Ghost Wing". The final tests are due to be conducted at home base during the President's visit. But suddenly after landing, the fighter jet explodes in a ball of flame. A transmission is sent to the three aircraft circling the skies above. "A bomb has been planted on the Knight 4 leading to it's total destruction. The president is current MIA. The terrorist who has targeted the president -- is amongst the six of you" The culprit, when discovered will be shot down. A desperate negotiation ensues--

"To those of you who lack the courage to die alone. Shall we die together? I'm waiting for those who are interested to contact me." Date: XX Month, 20XX. Somewhere in Tokyo. - Inspired by a post on a certain social media, six people seeking to end their lives gather. At the arrangement of the organizer of the suicide meeting, they will have a final dinner before leaving this world together before dawn. However, it turns out that the six cannot die together; the organizer is discovered as a corpse. Did the organizer commit suicide? Or... was the person murdered? Amid various speculations, the remained five begin to debate.