A group of strangers discovers the dangers lurking in a secluded retreat, and face their wildest nightmares as they struggle to survive and solve the mystery behind a stolen jewel and a dangerous spellbook.

Satur and Tina are married, and Berta enters their life as a ‘unicorn.’ In the end, however, Satur is pushed out and Tina and Berta have an affair. Manu is a loser who tries to embark on a relationship with Amanda, who at the same time is involved with Alex, Claudia and Marta and Esteban, with whom they are all co-raising two children. Everyone seem to be living many different lives but all of them will have a lot to learn from each other.

Inspector Amaia Salazar confronts the origins of her nightmares as she unfolds the darkest secrets of the Baztan valley. Part 3 in the Baztan Trilogy.

Inspector Amaia Salazar must return to the Baztan valley in order to solve a series of suicides that seem to follow a similar pattern.