Julio Olmedo travels to the Grand Hotel to visit his sister who works there as a maid. He discovers that she is missing and begins investigating her disappearance.
Julio finds Cristina's blood-soaked uniform disposed of by Diego, he vows to Alicia he must find out the truth. Sofia has to deal with the dire consequences of her fall, and a detective arrives to investigate the death of the prostitute.
While Doña Sofia is put in front of the difficult choice of what child she will protect, Julio is closer than ever to finding out who killed his sister.
Alicia helps Julio gain access to Pascual's house where he finds Cristina's belongings, not realizing that someone has followed him. Alfredo and Diego's rivalry, Belén's pregnancy, and Javier's affairs keep the hotel in suspense.
Having revealed Julio's true identity, Ayala surprisingly asks him to collaborate. When they realize they are dealing with a serial killer they team up with Alicia to try to prevent the next murder.
Wanted by the police, Julio lays low but reveals something new about Diego when he spots a guest wearing Cristina's pendant. Sofía thwarts her mother's plans to foster Belén's child, and Javier is challenged to a duel by an enraged father.
Overjoyed about the reunion with his sister, Julio learns from Cristina that her disappearance was due to a letter powerful enough to shatter the Grand Hotel. Incredulous of Cristina's accusations, Alicia threatens to go to Ayala's.
His investigations is at a dead end, Julio asks Alicia to leave everything and run away with him. Alicia is ready to put her heart first for once. Andrés comes across surprising evidence despite Doña Teresa's efforts to keep it under wraps.
Julio returns to the hotel to take revenge while trying to persuade Alicia not to marry Diego. Detective Ayala uses fingerprints from the murder weapon to identify the killer and the infamous letter falls into Belén's hands like a godsend.
