Leanne is Nina's mother and the hardworking owner of the Black Friar Inn in Waitsfield, Vermont. Having restored the inn from a ruin, she relies on physical labor and self-sufficiency to support her family. When Nina goes missing, Leanne's maternal drive pushes her to take direct, sometimes illegal action to find answers, putting her at immediate odds with the wealthy Jordan family and their calculated public relations defense.

Jamie is Simon's mother, a woman deeply enmeshed in her husband's wealth and social status. She secretly sells her designer clothes and replaces handbags with knockoffs to build a hidden offshore bank account containing $1.9 million, fearing her husband might eventually leave her. She instinctively closes ranks to shield her son from the police, running "sock puppet" social media accounts to bolster their public relations campaign.

Andy is Leanne's husband and a landscaper by trade. He serves as the calm, reasonable counterpart to his wife's frantic worry, initially attempting to trust the police process. As the Jordans' online smear campaign begins to destroy his business with false rumors and incites strangers to harass him, his faith in the system erodes.

Rory is Simon's wealthy father. Operating with a corporate mindset, he views the crisis of Nina's disappearance as a public relations and legal problem to be managed. He quickly deploys his vast financial resources to hire elite lawyers and a reputation management firm, creating a fake news channel called "Justice for Simon" to flood the internet with disinformation.

Simon is Nina's boyfriend and the prime suspect in her disappearance. Outwardly charming, his relationship with Nina has grown increasingly possessive, requiring her to FaceTime him during lectures so he can monitor her. When he returns from their Vermont trip alone with a shifting story about a breakup, he relies on his parents' aggressive protection to avoid police scrutiny.

Nina is a twenty-year-old college sophomore and avid rock climber whose disappearance sparks a massive public controversy. She views the mountains as a personal sanctuary away from the demands of her daily life. Her decision to confront her controlling boyfriend at a secluded cabin sets the stage for the escalating conflict between her family and the Jordans.

Matthew is a detective investigating Nina's disappearance. He faces significant obstacles from the Jordans' legal team and security staff, who block his access to surveillance footage. He attempts to follow official procedures while managing the Frasers' growing frustration with the slow pace of the justice system.

Grace is Nina's fifteen-year-old sister. Initially trusting of Simon, she struggles to navigate the intense media scrutiny and vicious rumors spreading through her high school. Her grief and isolation make her vulnerable to manipulation during the chaotic aftermath of her sister's disappearance.

Sarah Jane is a new detective assigned to Nina's case. She handles digital forensics, tracking cell phone pings and financial records to piece together a timeline of the Vermont trip. She provides crucial insights into the unusual tone of text messages sent from Nina's phone.

Arnie is a prestigious criminal defense lawyer hired by Rory Jordan. He immediately shuts down police access to his client, using his legal expertise to stonewall the investigation and advising Simon to stay close to home.

Julie is a bartender and friend of Nina. She helps facilitate the local search campaign and holds crucial information about Nina's relationship dynamics before the disappearance, recalling suspicious bruises.

Olivia is a friend of Nina living in Boston. She shows the police unusual, gushy text messages received from Nina's phone late on the night she goes missing, prompting detectives to question the messages' authenticity.

Rita is the Jordans' housekeeper, having worked for the family for twelve years. She notices unusual behavior in the home following Simon's return from Stowe, specifically regarding his laundry habits.

Principal Gabriel runs the high school where Grace attends. She prioritizes the school's image and deflects responsibility when media attention disrupts the campus, suggesting homeschooling rather than providing support.

Jeremiah is a security guard at Grace's high school. He harbors a long-standing dislike for Simon Jordan based on past incidents where he believes Simon framed another student.

Ronnie is Rory Jordan's head of security. He obstructs the police by citing international data laws, claiming the surveillance camera data is stored on servers in Panama.

Alistair is an attorney initially contacted by Rory Jordan to set ground rules when the police first interview Simon at the family home.

Isaac is Julie Bradley's brother. He attends the volunteer search at the Stowe property to document the event for social media.

Craig is Andy Fraser's brother. He owns a farm that serves as a potential safe haven when the media and online harassers descend upon the Fraser family.

Molly is a high school student and friend of Grace Fraser. She is questioned when Grace goes missing from her classes.

Dr. Sears is a forensic psychiatrist consulted by the police to analyze the behavior of those harassing the Fraser family, assessing threat levels from obsessive individuals.

James is a local man who believes the fabricated online rumors about the Frasers. He aggressively confronts Andy outside the high school, accusing him of being a pervert based on the internet smear campaign.

Trudy is a retired cadaver dog brought in by volunteers to search the woods near the Jordans' property. Her alert on a specific patch of disturbed earth provides a critical clue to the search party.

Charlie is Grace Fraser's horse. He provides her with a physical means of escape during an uncomfortable encounter in the woods and serves as a comforting presence during her emotional turmoil.