Ana and David say goodbye like any other day. The young lady has plans, but she won't be late. However, something extraordinary happens; something that alters her reality and changes everything completely.

The story of nine-year old Maria and her father Marcelino who, in 1879, found the first pre-historic cave paintings at the now world famous Altamira cave.

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.

Recounts the experiences of a middle-class family, the Alcántaras, during the last years of the rule of Francisco Franco and the beginning of the Spanish Transition to democracy.