Two friends named Andi and Babon on a mission to find a friend who disappeared while climbing a volcano called Rio.

From the creators of 2017's #1 movie "Pengabdi Setan", and the highest-grossing horror movie ever, comes a bone-chilling series based on the legends surrounding the iconic Mount Merapi - and the spirits long said to haunt it. A friend goes missing and is presumed dead after hiking Mount Merapi. Andi and Baboon mounts an ill-fated expedition to find the truth. They are unprepared for what lies in wait.