It tells the story of a group of upper-class teenagers whose life changes abruptly after the arrival of edu, a young neighborhood. The contrast between the two worlds, along with romantic relationships group of teenagers, make up the fabric of a youthful series that adds a new element to the genre: a plot of thriller, linked to a murder mystery in which they are involved three of the protagonists. Throughout the chapters, the public will contemplate the birth of a music group, crime investigation, an impossible romance and, ultimately, the transformation of the life of a gang of teenagers, aged 16, began to show itself to the life.

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.

A global cataclysm, caused by a fatal accident in Geneva (Switzerland) during the implementation of the particle accelerator will lead to the crew and students of the school-ship Polar Star to live the greatest adventure of their lives. Isolated and aware that we only have each other, the ship will become their only home.