The Invisible Girl

A body appears at the high school; Julia's father Miguel Ángel is the Civil Guard lieutenant in charge of the case; Julia starts a parallel investigation in secret and discovers something disturbing.

The press is already talking about The Compass Killer due to one of the objects found next to the body; the police question the victim's friends and relatives and arrest the primary suspect; they can't find conclusive evidence.

While some people don't attend Aurora's funeral, a few of the mourners behave oddly at the ceremony; the interrogation continues; the murder weapon has yet to appear; Patri is starting to get more anxious; Iván tells Julia his version of the events.

The serial killer hypothesis gains traction as a second body appears in Cárdena; the police continue their investigation and find new clues; Julia discovers the riddle she received is an acrostic, and she deciphers a disturbing message.

A traditional competition is held in Cárdena where several male pigeons are set loose after a female to breed; some of the objects found next to Aurora's body belong to teachers from the high school, and this creates tension in the town.

In despair, the town decides to organize a procession of the Virgin Mary to invoke her protection, but a third body appears; Miguel Ángel discovers several secrets that are relevant to the investigation; Julia solves the chess riddle.