Isva and Celia are planning on going to the Laris complex to attain a special treasure which would have them covered for the next few years. They're excavators attaining rare materials from the vast amounts of abandoned complexes after the Rexcelix Incident. This game is a metroidvania-esque adventure with rpg elements included.
The demo contains the first area and boss of the full game. You can switch between the two protagonists simultaneously for different play. The full game can be bought at samroga.com