‘The Truthers’ Ending Explained: What Really Happened to Ruth’s Mother in Netflix’s New Spanish Thriller

Netflix’s Spanish psychological thriller ‘The Truthers’ premiered globally on July 24, 2026, bringing the story of a grieving daughter and her conspiracy obsessed father to a wide international audience. The film follows Berlin based DJ Ruth, who returns to her hometown after the death of her mother and meets her estranged father Martín, a man who has become a truther. The project comes from director Roger Gual and is written by Carlos Montero and Darío Madrona, the pair behind Netflix’s hit series ‘Elite.’

The film, also known by its original Spanish title ‘Los Creyentes,’ spends most of its runtime asking whether Martín had a hand in his wife’s death. By the time the credits roll, that question gets answered, though the emotional fallout for Ruth and her father proves far heavier than a simple murder reveal.

What Happens to Ruth’s Mother in ‘The Truthers’

Ruth had been living apart from her parents for two years, working as a bartender in Berlin and rarely speaking with them. Out of the blue, her mother Lucia began calling, texting, and leaving voice notes for her, none of which Ruth answered until Martín called to tell her that Lucia had died after a fall.

According to accounts of the film, Lucia’s death traces back to the strain in her marriage rather than any outside threat. She had discovered the elaborate plan Martín was building against a pharmaceutical company called Certyx, and her distress over his obsession led her to drink heavily before she fell and died in the bathroom.

That accidental fall becomes the seed of Ruth’s suspicion once she is back under her father’s roof. Inconsistencies in her mother’s final days, combined with the strange voice note left behind, push Ruth toward believing Martín is responsible even before she understands the full picture.

The film deliberately keeps viewers locked into Ruth’s point of view during this stretch, which makes Martín’s paranoid behavior read as suspicious rather than simply broken. Every clue in the story is filtered through Ruth’s growing distrust, making it difficult to separate her father’s conspiracy theories from an actual cover up.

Martín’s Conspiracy Theory Takes Over the Family

Martín’s transformation is central to why Ruth doubts him so completely. Once a member of the Spanish Civil Guard, he becomes a grumpy, aggressive man consumed by a conspiracy theory after retirement, and his erratic behavior widens the gap between him and his daughter.

His fixation centers on Certyx and a missing local boy named Alejandro, whom Martín believes the company abducted for experimentation. The community’s desperate search for answers after Alejandro’s disappearance is what pushes Martín toward the eccentric explanations he clings to for the rest of the film.

The house itself becomes part of the mystery, filled with hidden rooms and surveillance equipment that Ruth stumbles upon. What she eventually learns is that the cameras were never protecting the family from any real enemy, and that Martín’s obsession with exposing hidden truths functioned as a psychological shield against something far more painful.

That shield, according to accounts of the story, was grief itself. For Martín, chasing imaginary enemies proved easier than accepting that illness and loss had taken away the woman he loved, and his refusal to process that grief becomes the true force pulling the family apart.

How ‘The Truthers’ Ending Explains the Truth

The final act shifts from suspicion to action once Martín becomes convinced that Certyx has gotten to Ruth as well. After discovering that Ruth had been searching through his secret attic, Martín decides she can no longer be trusted, binds her in the house alongside his ally Berta, and leaves to carry out the plan he had been preparing for months.

While restrained, Ruth has a breakthrough that changes everything she believed about Alejandro’s disappearance. A news broadcast featuring Alejandro’s photo triggers her memory of something she once cut her leg on while swimming in a nearby lake, and she realizes it was the boy’s bicycle, meaning he had simply drowned rather than been taken by Certyx.

Ruth frees herself and rushes to stop her father before the bombing can happen, but she arrives too late. By the time Ruth and her friend Aron reach the Certyx building, Martín and Berta have already set the explosion in motion, and the structure collapses on top of them, killing both instantly.

In the aftermath, Ruth is left to process a truth that offers no real comfort. She ultimately sells the family house in her hometown, parts ways with Aron, and relocates to Madrid in an attempt to leave the painful memories behind.