In the third episode of "Someone Has to Know," Detective Montero is determined to uncover Father Andrés's hidden secrets, vowing to keep pursuing him until he confesses the truth. The detectives discuss their findings, and Montero is shocked to learn that the priest was once a member of the communist party. Concha reads the penitential rites, explaining that a priest cannot reveal anything said during confession. Montero tells the team that he will try to get the priest to open up.
Meanwhile, Vanessa's friend takes her to a psychic named Horacio, who practices psychoscopy. He uses one of Julio's shirts to try and tap into his energy and locate him. Elsewhere, Detective Carrasco searches the confession box and the rectory for clues. The team discusses the parishioners, and Concha notes that the church serves both very poor and very wealthy people.
The detectives attend a wedding mass led by Father Andrés. During the ceremony, he speaks about secrets and fears, emphasizing how couples must be truthful with each other. At the reception, Father Andrés feels uncomfortable as guests discuss Julio's disappearance while sympathizing with Vanessa. Montero confronts him, but the priest ignores him and leaves. Detective Vásquez speaks to Bruno, but he avoids her questions and irritates her.
Vásquez notices the DJ and remembers that he works at the discotheque. She speaks to him and learns that Alan was playing at the club the night Julio disappeared and has been in hiding since. Meanwhile, Vanessa asks Eric to join her and Horacio in their search for Julio, but he refuses, forgetting about his law school interview.
Elsewhere, Horacio takes Vanessa to the discotheque where Julio was last seen. He leads her to a basement and claims that Julio witnessed something he should not have. He later takes her into the woods and finds Julio's necklace to convince her that he was there.
The episode is filled with tension and suspense as the detectives and Vanessa work towards finding Julio and uncovering the truth about Father Andrés's past. The setting of the church and the themes of secrets and truth make for a compelling narrative that keeps viewers on the edge of their seats.
Montero approaches Eric outside the courtroom, his brow furrowed in concern as he inquires about Vanessa's whereabouts. Eric's words, "She's with Horacio," are met with a scowl from Montero, who lays the blame squarely on Eric's shoulders for leaving Vanessa with a con artist. With a sense of urgency in his step, Montero rushes to find her.
At the discotheque, Montero has Horacio arrested, a move that enrages Vanessa. He promises to uncover the truth about Julio and reminds her of Eric's upcoming interview. She rushes to the courtroom but accidentally hits an animal on the way, blaming herself for neglecting Eric.
Back at the courthouse, Eric successfully completes his interview and is awarded his degree, a moment Vanessa celebrates with joy.
Meanwhile, Montero reaches out to the archbishop for assistance in getting Father Andrés to speak about the confession. He is advised to spend time in prayer with Vanessa and Eric, hoping it will influence the priest.
Elsewhere, the detectives arrest Alan at a nightclub and interrogate him. He denies involvement but admits to being afraid he would suffer the same fate as Julio. Alan reveals that he left La Cucaracha early that night and tells the detectives that he saw a group of boys chasing and attacking Julio in the woods.
