El Internado (2007 - 2010)

The events take place in a boarding school where children from the most influential and wealthy Spanish families study. A teenager named Marcos enrolls there with his younger sister, Paola. Their parents have disappeared without a trace. Everyone believes they are long gone, but the children are convinced that their mom and dad will eventually be found. Additionally, a mysterious woman named Maria becomes a maid at the boarding school. It turns out that she escaped from a mental institution in order to find her lost son...