Pip knocks on the Singh family's door and introduces herself to Ravi, explaining her capstone project intends to prove Sal was innocent.

Ravi asks Pip to be his official partner in the investigation and reveals that he still has Sal's old phone.

Pip goes undercover at a calamity party and secretly photographs Howie Bowers making a drug deal to use as leverage.

Pip and Ravi use the drug deal photos to blackmail Howie Bowers into revealing that Andie hid a second burner phone in her bedroom.

Pip and Ravi break into the Bell house using a spare key hidden in wind chimes and search Andie's bedroom for the burner phone.

Pip finds a timestamped photograph on Max's secret Facebook profile proving Sal was still at the party until at least 12:09am.

Pip confronts Max and Naomi with the photo evidence, and Naomi tearfully admits the group lied to the police about Sal's alibi.

Pip agrees not to take the photo to the police and promises to find Andie's real killer herself in order to protect Naomi.

Someone breaks into Pip's bedroom and types a threat hundreds of times across her computer screen, proving the killer can reach her at home.

Pip's dog Barney is kidnapped as a warning, and after Pip destroys her computer to comply with the kidnapper's demands, Barney is found drowned.

Ravi returns and convinces Pip to continue the investigation after figuring out that Barney was taken as a deliberate threat to silence her.

Pip and Ravi print every capstone log entry and build a murder board connecting all suspects with red string and multicolored thumbtacks.

Pip checks the print history on the Wards' home computer and discovers Elliot Ward printed the threatening note left in her school locker.

Elliot Ward confesses to Pip that he had an affair with Andie, accidentally injured her, framed Sal, and murdered Sal to protect his secrets.

Pip delivers her capstone presentation to the entire school and press, accusing the Fairview community of turning Sal's memory into an unjust monster.

Pip begins a senior capstone project to prove that Sal Singh was falsely accused of murdering Andie Bell, and she enlists Sal's younger brother Ravi as her partner. Their investigation takes increasingly dangerous turns as Pip goes undercover, blackmails a drug dealer, and breaks into the Bell house searching for evidence. A hidden photograph proves Sal had a solid alibi, but Pip chooses to protect her best friend's family rather than hand the evidence to police, promising instead to find the real killer. Threats escalate from notes to a break-in at Pip's home to the murder of her dog Barney, yet Pip refuses to give up. A clever printer-tracking scheme exposes Pip's history teacher Elliot Ward as the anonymous threatener, and he confesses to having an affair with Andie, framing Sal, and murdering him. The discovery that the girl Ward held captive is not actually Andie forces Pip to keep digging, ultimately leading to the true killer and a public capstone presentation that finally clears Sal's name.

The headline events of Pip's investigation from first meeting to final reckoning.

Pip's first capstone log entry documents Andie Bell's last known movements and establishes the exact time window when the crime must have occurred.

Pip interviews local journalist Stanley Forbes, who claims Sal's Indian ethnicity explains why he would have killed Andie out of possessiveness.

A grocery store cashier refuses to touch money Ravi offers her, and Pip furiously confronts the woman before Ravi tells her to stop.

Pip interviews Naomi Ward about the night Andie disappeared and begins to suspect Naomi may have slipped out of Max's house unnoticed.

Pip texts Emma while pretending to be Chloe and confirms Andie was secretly seeing an older man she had the power to ruin.

During a camping trip, an unidentified figure watches Pip and her friends from the trees at night and flees before being caught.

Pip and Ravi visit Nat da Silva, who admits putting a threatening note in Andie's locker and reveals her brother Daniel worked the Bell case as a first responder.

Pip finds a photograph of Andie in her underwear hidden in Max Hastings's room, and Max admits he was buying drugs from Andie at parties.

Pip witnesses Stanley Forbes angrily shoving a thick cash envelope into Howie Bowers's chest at the station parking lot late at night.

Pip follows Howie Bowers from the parking lot and discovers he lives on Monroe Street, the same street where Andie's abandoned car was found.

Pip and Ravi visit the Ivy House Inn, where the elderly owner with Alzheimer's insists she saw Andie Bell in person just weeks ago.

Pip receives a threatening text from an unknown number calling her a stupid bitch and ordering her to stop the investigation immediately.

Pip secretly slides her phone under the back seat of Elliot Ward's car to track his movements using a location-sharing app.

Elliot Ward is arrested at the house on Gravesend Road while Ravi, who tracked Pip's location using his phone, races to the scene.

Becca Bell confesses to Pip that she disposed of Andie's body in a septic tank at the old farmhouse on Sycamore Road.

While building her capstone investigation, Pip encounters a cast of secondary characters whose secrets and encounters gradually piece together what really happened around the night Andie disappeared. From her early interviews with biased journalist Stanley Forbes to witnessing Ravi's mistreatment at a grocery store, Pip faces the prejudice that has shaped public perception of the case from the start. Her search leads her to drug dealer Howie Bowers, whose address connects to the abandoned car and whose dealings reveal the darker side of Andie's life, while a visit to the Ivy House Inn provides a tantalizing but inconclusive glimpse at Andie's secret affair. Mounting threats in the form of texts and anonymous notes warn Pip to stop, but she responds by planting a tracking device in her teacher's car to catch him in a lie. When Ward is arrested at his old home and Ravi arrives having tracked Pip's location, the truth about the captive girl Ward has kept is laid bare. Becca Bell's devastating confession about what she did with Andie's body finally answers the question that has haunted Fairview for years.

The supporting investigation events that filled in the full picture of the case.

Pip formally submits her senior capstone project proposal, declaring she will investigate Andie Bell's case and prove Sal Singh was falsely accused.

Pip and Ravi compare Sal's final confession text to his other messages and notice it contains punctuation marks he never normally used.

Pip and Ravi discover a note on Sal's phone reading '009 KKJ,' which they believe is a license plate number Sal secretly recorded.

Pip's second interview with Emma Hutton reveals that Andie openly disliked and resented Elliot Ward, calling him an asshole the week she vanished.

Naomi tells Pip that Andie bullied Nat da Silva out of school by posting a topless video of her online and threatening to spread damaging rumors.

Pip discovers a handwritten threatening note inside her sleeping bag at the camping trip, reading 'Stop digging, Pippa,' and realizes someone followed them.

Pip secretly changes settings on Cara's computer so that every document printed from the Wards' printer will be saved and recorded.

Pip and Ravi discover that the license plate on Howie Bowers's parked car exactly matches the '009 KKJ' note found on Sal's phone.

Pip decodes 'IV @ 8' from Andie's planner and recognizes the distinctive bathroom tiles in Andie's photo as belonging to the Ivy House Inn.

Pip and Ravi time a murder scenario step by step and calculate that Sal could not have killed Andie and disposed of her body in the available time.

Max reveals that an anonymous person threatened to expose the group's hit-and-run accident unless they lied to police about Sal's alibi.

Pip opens her school locker to find a note reading 'This is your final warning, Pippa. Walk away,' and realizes she is dangerously close to the truth.

Pip realizes the temporary number Naomi used to call her matches the scribbled-out number in Andie's planner, linking both to Elliot Ward's phone.

Pip calls Max Hastings, and he confirms he spiked Becca Bell's drink at a calamity party and had sex with her that night.

Becca spikes Pip's tea, chases her into the woods, and attempts to strangle her before Ravi and Pip's father arrive and stop the attack.

From the moment Pip formally proposes her capstone investigation, a series of mounting revelations progressively dismantle the accepted story of what happened to Andie Bell and Sal Singh. Small but crucial clues, such as suspicious punctuation in Sal's final text and a mysterious license plate number on his phone, plant early seeds of doubt that someone else is responsible. As the investigation deepens, Pip uncovers Andie's capacity for cruelty toward Nat da Silva and identifies the Ivy House Inn as a secret meeting location through careful code-breaking, while a timed murder reenactment mathematically rules out Sal as the killer. The exposure of Max's hit-and-run accident explains why Sal's friends were blackmailed into lying about his alibi, and a clever printer-tracking scheme unmasks Elliot Ward as the person behind the threatening notes. The final turning points arrive when Pip forces a confession from Max about his assault on Becca Bell and then confronts Becca directly, only to face a poisoning and near-strangulation that is stopped just in time by Ravi and her father.