Locked-Room Mystery on a Deserted Island: Everyone Is a Suspect

In late September, a powerful typhoon named Canglan swept across the eastern coast, bringing torrential rain with it. The detached villa stood atop a solitary cliff jutting out into the sea. Locals called it Headless Cliff. Its only connection to the mainland was a narrow path across a pebble beach, which the rising tide was now swallowing bit by bit, until it vanished into the murky seawater.