Shook

At a cosmetics promotion event, the infamous Southland Dog Killer escalates from targeting pets to committing murder. Online beauty influencer Genelle is brutally killed in a restroom, shocking attendees and sending a wave of fear through the online community.

Social media sensation Mia Larson decides to cancel her planned livestream to stay home and watch over her sister Nicole's dog, Chico. This decision marks the beginning of a perilous night filled with unexpected terror and emotional turmoil.

Unbeknownst to Mia, her sister Nicole is in San Francisco for treatment of a hereditary disease that took their mother's life. This situation adds pressure to Mia's night as she is unaware of the impending chaos about to unfold.

Mia receives terrifying texts and calls from her sister's neighbor Kellan, who reveals through unsettling videos that he has kidnapped Nicole, her friends, and Chico. This shocking revelation forces Mia into a twisted game where she must comply with Kellan's dares to protect her loved ones.

In a moment of desperation, Mia must choose between her friends and Chico, resulting in the dog's apparent demise. This heartbreaking decision weighs heavily on her conscience as she is forced to navigate the dangerous game set by Kellan.

Just when Mia believes everything has gone terribly wrong, Lani contacts her to reveal that the entire ordeal was a prank livestreamed for her followers. Mia is devastated to learn that her emotional breakdown was exploited for entertainment, deepening her feelings of betrayal.

The situation takes a horrific turn when Mia discovers Lani's lifeless body floating in her pool. Overwhelmed with dread and confusion, Mia begins to realize the nightmare is far from over and that danger lurks closer than she imagined.

Mia receives an urgent call from Santi, who claims he is trapped in a nearby house. Feeling the escalating threat, Mia calls for a rideshare, hoping to escape the terror surrounding her and reach safety quickly.

As Mia grapples with loss, Kellan intensifies his torment by sending creepy messages and instructing her to endure painful injections. This dehumanizing treatment pushes Mia to her limits as she struggles to find a way out of the nightmare.

Mia discovers Santi suffocated and learns from Jade that they were compensated for participating in the prank. As Kellan exposes the financial ruse behind Lani's lavish lifestyle, Mia realizes how deep the betrayal runs.

In a shocking confrontation, Mia uncovers their mother's remains hidden in a closet and learns that Nicole has orchestrated the entire terror, including the previous dog murders. This shocking betrayal drives a wedge further into the already fractured sisterly bond.

A climactic standoff ensues between Mia and Nicole, where threats are made, raising the stakes for both sisters. Their violent encounter is broadcasted live, turning their tragic family drama into public spectacle, drawing audience attention.

Amid the chaotic conflict, Kellan arrives seeking answers but is shot by Nicole, prompting Mia to seize the moment and fight back. The unexpected turn of events adds more complexity to the already harrowing experience.

Though battered and traumatized, Mia manages to escape her sister's clutches and collapses onto the sidewalk. It is here that Big Mike, her rideshare driver, finds her, unaware of the full extent of the nightmare Mia has endured.

As Mia lies on the ground, she feebly responds 'No' when asked if she is Mia, oblivious to the fact that Nicole is still alive. The chilling conclusion leaves open the possibility that the nightmare may not yet be over, keeping audiences on edge.