Underground is a Mystery, Horror film that follows seung-hyeon, a construction team leader with PTSD, is ordered to inspect Dohak Station, where a fatal accident halted work years ago. Inside the eerie, abandoned tunnels, he and Joo-young encounter two mysterious workers and become lost while trying to escape. Meanwhile, a CEO and a shaman perform a ritual to resume construction, but enraged spirits retaliate, plunging everyone into chaos. Underground is not currently listed with streaming providers in your selected region, but availability can change over time. Fans of mystery movies may also want to explore similar titles below.