In the compelling fourth episode of "Breathless," titled "I Trust You," the
medical staff at Joaquin Sorolla Public Hospital finds themselves on the brink
of a significant strike, a decision that will test their loyalty to each other
and their patients. The episode picks up three weeks later, with the day before
the planned strike looming large.

The tension is palpable as Moa rallies the staff to participate in the strike, emphasizing the need to send a strong message to the government. The plan is to halt all services, including those in the ER, a move that not everyone agrees with. May, in particular, refuses to support the strike, creating a rift among the staff. Despite the pressure to conform, she initially agrees to keep quiet, but this decision strains her relationship with Rocio, who is a staunch supporter of the strike.
The stakes are raised when a pregnant patient is rushed to the ER and declared brain dead. Rocio, determined to uphold the strike, orders the patient to be transferred to another hospital in Alicante. However, during the transfer, the patient goes into cardiac arrest, forcing May to perform an emergency cesarean in the hospital hallway. Pilar catches them and is furious, warning Rocio that this could tarnish her medical record, but Rocio remains unfazed.
The personal lives of the characters continue to intertwine with their professional duties. Jesica is still reeling from the loss of her brother, Rodri, and feels abandoned by Lluis, who is caught up in his own responsibilities. Their relationship is further strained when Lluis cancels a dinner date, leaving Jesica feeling even more isolated.
Quique, meanwhile, is trying to distance himself from Oscar, but his attempts are thwarted when Oscar uses a dating app to trick Quique into a blind date. The situation is further complicated when Jesica and Biel arrive at Quique's place to help clear Rodri's belongings. Amidst the chaos, Jesica and Biel share a moment of intimacy, further complicating the web of relationships among the staff.
Patricia, the Valencian President, is eager to have her surgery before the strike, and Moa, despite his reservations, agrees to perform the operation just before the strike is set to begin. He keeps the details of the strike from Patricia, creating a tense atmosphere as the operation approaches.
As the strike begins, Moa starts Patricia's surgery but decides to stop at midnight, as planned. Pilar, however, is determined to complete the surgery, and despite the lack of support from the rest of the staff, she, Biel, and another doctor continue the operation. The results are less than ideal, and Patricia wakes up to the devastating news that her breast has been removed and the tumor is still present.
The episode ends on a heart-wrenching note as Patricia, in a fit of anger and betrayal, demands to know where Moa has gone. The consequences of the strike and the personal decisions made by the staff are laid bare, leaving the viewers with a profound sense of the complexities and challenges faced by those in the medical profession.
"I Trust You" is a powerful episode that delves into the moral and ethical dilemmas faced by doctors and nurses, as well as the personal sacrifices they must make. It is a stark reminder of the human side of healthcare and the difficult choices that must be made in the pursuit of change.