Fairy Valley Incident

In Taiwan's famous Fairy Valley, a group of celebrities, politicians and Hakka scholars are invited to stay at a hot spring villa for its soft opening. When a dead body is discovered the next day, the villa's new employee, Feng, begins to notice strange interactions among the guests, who act as if they've known each other and have something to hide. Along with his sister and a college friend, Feng tries to uncover the truth as more bodies start to pile up.
(Source: CATCHPLAY+)