The film opens with Ava Morgan, a data analyst living alone in a metropolitan high-rise, who begins receiving a series of late-night calls from an unknown number. At first she assumes it is a simple mistake, but the caller’s desperate whispers and the eerie familiarity in his voice unsettle her. When the calls escalate into panicked warnings urging her not to leave her apartment, Ava reports the incidents to the police, only to be told the number is untraceable. Her rational instincts clash with mounting anxiety as she realizes the caller seems to know intimate details about her daily routines.

As the situation intensifies, Ava confides in her coworker Liam, who helps her review security footage from the building. They discover that, on the nights she received the calls, the hallway cameras distorted or froze for several seconds, as though interfered with by an external signal. Suspicion grows that Ava is being watched, but the motive remains unclear. During one particularly disturbing call, the caller begs her to flee immediately, claiming someone is targeting her. His voice breaks, hinting that he has tried and failed to warn her before.

Driven by fear and curiosity, Ava begins investigating the number herself. She traces fragments of digital data to a defunct telecommunications tower on the outskirts of the city. Liam accompanies her to the site, where they find abandoned equipment and signs of unauthorized recent activity. Among the debris, Ava discovers a photograph of herself taken years earlier, alongside data logs referencing predictive algorithms capable of forecasting personal behavior. The clues suggest that someone has been compiling information about her for far longer than she imagined.

Returning home, Ava receives the most revealing call yet: the voice claims to be her own, recorded from a future timeline, attempting to prevent a fatal event. The revelation forces her to question her perceptions, wondering whether she is the subject of an elaborate technological manipulation or caught in a time-loop experiment. Liam, skeptical but concerned, urges her to disconnect entirely from digital networks, but the calls continue even after she destroys her devices.

The truth emerges when Ava confronts a former researcher tied to the tower project. He admits that experimental communication software intended to model future outcomes malfunctioned, producing catastrophic divergences in data streams. Ava, one of the test subjects chosen without consent, became the focal point of overlapping timelines. The “wrong number” was not accidental, but a desperate attempt from a future version of herself to save her from an impending attack tied to the project’s exposure.

In the final sequence, Ava narrowly avoids the predicted ambush, guided by the last fragmented message from her future self. The event exposes the experiment and forces the corporation behind it into public scrutiny. Although the calls cease, Ava is left with the lingering knowledge that versions of herself still exist somewhere within broken strands of time, reaching across the void in search of survival.