In a hell called the Sanctuary...When his plan to escape the deadly island ends in failure, Ryouta drags his banged-up body ashore, only to be approached by a mysterious mute little girl. She takes him to the heart of the island, where he finds a small village called the Sanctuary, home to seven players living out a peaceful coexistence. But with Ryouta's arrival, the chip quota to get one person off the island is reached. With the balance shattered, a nightmarish murder occurs in the once-tranquil collective. Who is the culprit?! In this brand-new arc, an explosive tropical locked-room murder mystery begins!!