From the publishers blurb:
The History of Neraka Valley is a tetralogy of adventures revolving around a singular narrative.
Each one weaves a fragment of the epic of an ancient temple nestled in a small, secluded mountain valley, from the present times to the days of yore.
The first adventure, The Lost Temple, is tailored for low-level characters, ideally even level 0 pcs (the brave townfolks of Neraka). Here, characters without heroic skills nor amazing powers and weapons must face men-eating monsters, traps and ancient misteries from of the past of a mysterious temple.
All the adventures in the History on Neraka Valley cycle are system agnostic. You will find everything you need to play: maps, rooms and monsters descriptions, pcs tokens and even music, but the statistics are limited to the essential. This allows you to easily use the adventures in the main fantasy rpg game systems.