Full-Scale Deduction: The Final Culprit

Ten years ago, Bao Na, a member of E University's Mystery Club, was murdered during a mystery-solving salon. The crime scene was a sealed room, and the other seven members who attended the event had no recollection of what happened. Everyone was a suspect, but with insufficient evidence, the case went cold. The seven members graduated and went their separate ways.

Ten years later, the seven reunite. One after another, they receive invitations and attend this grand revelation. Once again, they are locked inside a sealed room. The objects that pointed to each person's motive for murder ten years ago are laid before them once more, forcing everyone to drop their masks. The mysterious person who gathered them is hiding among the seven. They must complete the tasks this person has assigned within seven days, and find the real killer among them. Seven people, seven stories. Who is lying?