Dead Ground - by Marta Medina del Valle

Héctor is a Spanish engineer living in Paris who left his hometown as a teenager after his parents died in a strange accident. When the company he works for sends him back to his village to fix the data center they’ve built nearby, his pregnant girlfriend, Hélène, travels with him to support him in this trip back to his roots. 

There, he finds that the few remaining villagers are fighting to shut the project down, as it is causing blackouts and drying up the river and the crops. When Héctor suddenly disappears, Hélène discovers that the data center has awakened something ancestral that may be the cause of the people’s vanishing.