Candela, an unconventional judge with character, is sent to the remotest possible posting, El Hierro, an island that is full of peculiar characteristics, where she doesn’t quite fit in. As soon as she arrives, she must face a murder case. The victim is Fran, a young man who was going to get married on that very day. Everything seems to suggest the culprit is Díaz, Fran’s boss and father of the bride, a shady local businessman who had served sentence for murder as a young man.

Candela must decide if Díaz is kept in pretrial custody. Against the criterium of her team, and of the whole island, he is released on bail, although he won’t be allowed to leave the island and he will be closely monitored. In any case, it’s an extremely unpopular decision, compounded by Díaz’s determination to find the real culprit by himself. Candela, at odds with her own team, needs someone by her side to rely on, someone who also knows the ropes of the island. She takes a new controversial decision – she includes Reyes, a local police officer, in the investigation team.

The investigation brings to light the dark side of Fran’s life: he had established contact with some mysterious person in Holland, and he had an affair with an unknown lover. Did Fran die because he was involved in some shady business? Or was it a crime of passion? Both Candela and Díaz make progress in their respective investigations, carried out independently. Díaz believes Fran used his contacts from the milieu of a dangerous drug smuggler. And Candela makes an uncomfortable discovery – Fran’s mysterious lover is someone very close to her.

During a clandestine trip out of the island, Díaz discovers that Fran, just before he died, was trying to sell some valuable merchandise. He doesn’t know what kind of merchandise. And above all, he doesn’t know who was the partner from El Hierro who cooperated with him in the operation. This mysterious partner could be the murderer, because he is trying to get something from Fran’s environment (he broke into his and his mother’s houses…) Meanwhile, Candela feels the police investigation is progressing too slowly. The only person she trusts is Reyes. And in fact, the local police officer does discover (and us with her) who the murderer is. But she won’t live to tell the tale.

The hearing for the custody of the girls is launched after the delay caused by the disappearance of one of them.

A murder sets in motion the investigation led by Candela and Sergeant Cruz. Diaz, who believed he had solved his problems, soon discovers how wrong he was.