Five years after
the first film, Stephanie Smothers is a famous
true crime vlogger, an amateur
detective and has written a book about her friendship with Emily Nelson and her subsequent imprisonment. At a book signing, Emily appears, as she is filing an appeal. Marrying her old friend Dante Versano, a wealthy
Italian from a mafia-connected family, she asks Stephanie to be her
maid of honor. Emily pressures her to accept, promising increased book sales and threatening a potential lawsuit. Arriving in
Capri with Dante and Stephanie's agent Vicky, they reunite with Emily's ex-husband Sean and son Nicky. Also there are Emily's mother Margaret and her aunt Linda, as well as Dante's mother Portia. The latter accuses her of marrying Dante for his money. At the pre-wedding lunch, bitter and intoxicated, Sean argues heatedly with Dante. Stephanie and Emily reconnect at her "bachelorette party", where she is the only guest. Returning to the hotel, Stephanie finds Sean murdered in his hotel room, which local police write off as an "accident". Suspecting Emily's involvement, she follows her the next day, but an American tourist distracts her. The 'tourist' is
FBI agent Irene Walker, investigating Linda. She shows Stephanie a photo of Linda talking to a mysterious woman with Emily's tattoo. They are interrupted by Dante, who Stephanie later sees in a heated discussion with Matteo Bartolo, a Versanos' rival family member. Emily and Dante are married. At the reception, he overtly burns their
prenuptial agreement, declaring it a gesture of peace between the Versanos and the Bartolos. Later that evening, Stephanie follows Dante as he leaves the reception, only to witness him being shot dead. Portia accuses Emily of the murder, while Linda casts suspicion on Matteo, who vehemently denies it. With Emily's presence accounted for, and Stephanie being the only murder witness, she is branded the prime suspect. She is placed under
house arrest while the death is investigated. Stephanie meets with Emily, but soon realizes from her odd behavior that she is Charity, the third of the triplets that included Emily and her late sister Faith. Charity stabs herself, then frames Stephanie. Isabella, a housekeeper paid by Irene, frees her from her captivity. Entering Margaret's room; she reveals that Charity's
stillbirth was faked by Linda, a
con artist who raised her as her own. Leaving the hotel, Stephanie meets Irene. However, before she can reach a safehouse, Irene is fatally stabbed by Charity in disguise once again framing Stephanie. Meanwhile, Linda discovers from Margaret that Stephanie spoke with her, so smothers her with a pillow. Stephanie is taken to meet with Portia. Portia injects Stephanie with
sodium thiopental, convinced she and Emily conspired to kill Dante. Unable to get satisfactory answers, Portia orders her killed, but Emily rescues her. Linda had attempted to blackmail her and Dante, threatening to reveal their wedding was a
marriage of convenience to hide Dante and Matteo's relationship. Upon refusing, Charity confronts Emily. Obsessed with her, she killed both Sean and Dante. Charity drugged her and married Dante in her place, with Emily only escaping because Charity forgot to drug her. Charity, posing as Emily, livestreams a coded threat via Stephanie's phone to Emily and Stephanie, threatening to kill Nicky if Stephanie does not turn herself in. Stephanie and Emily confront Charity and Linda, who have Nicky at gunpoint. Linda plans to kill Stephanie, pinning the murders on her, with Charity assuming Emily's life, money, and position with the Versanos. Stephanie points out that Emily will also have to die, which Charity rejects. In the ensuing commotion, Nicky flies a toy drone into Linda's face, allowing Charity to take her gun and shoot her, sending her over a cliff to her death. Emily convinces Charity to take her place in prison and responsibility for all of the murders. Stephanie returns home, writing a second book about the Capri murders and honoring Emily's wish to give Nicky a normal life. Emily remains in hiding in Italy, where Portia approaches her. Revealing she knew Emily and Dante's marriage was a sham and she did not commit the murders, she welcomes Emily into the Versano family. Then, she requests "a simple favor", handing her an envelope. ==Cast==