The alarm tells the strange experiences faced by a group of characters in a near and dystopian future. No one knows exactly why, but it is impossible to go outside. A couple is forced to live with an unknown family while the world beyond the windows of their house seems to disintegrate forever. But the biggest threat of all might be inside, in the exact center of the dining room table. Or at the bottom of the nightstand drawer. Or in the past.

Things change massively at a girls' school in 1920s Sevilla when a new teacher arrives with a secret goal related to the academy itself.

A soldier from the 15th century, a university student from the 19th century and a nurse from the present join the secret 'Department of Time', a secret department within the Spanish government with the ability to travel through time. Their mission is prevent changes in history.

The Sagrada Familia, Antonio Gaudi's most ambitious creation, was begun in the 19th century and is still under construction today. With Gaudi's tragic death in 1926 and the destruction of original models during the Spanish Civil War, the building languished for decades.