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.

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 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.

The lifeless bodies of a man and two women appear in a house in Miami. Some images recorded by a video camera lead the police to believe that the murderer is the Spaniard Pablo Ibar, who will be tried and sentenced to death.

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.