Passion

Isabelle secretly has an affair with Christine's boyfriend Dirk, introducing a dangerous personal complication into the campaign. She also comes up with a well-received marketing idea for the new smartphone.

Christine later claims Isabelle's idea as her own, denying her protégé credit. Isabelle feels insulted and demoralized, but their tension eases when Christine shares the story of her twin sister's death.

Christine's story about her twin sister's death creates a moment of vulnerability between them. Isabelle senses the shift and the two briefly reconcile.

Isabelle uploads a self-made version of the ad to the web, and it quickly goes viral. The online buzz thrusts Isabelle into the spotlight while Christine watches with mixed feelings.

Christine taunts Isabelle with the sex tape she had made with Dirk, publicly humiliating her. The confrontation deepens the rift and pushes Isabelle toward a retaliatory mindset.

Isabelle crashes her car in the company's parking garage, a dramatic consequence of the escalating feud. The accident underscores how personal vendetta has spilled into dangerous, real-world actions.

Christine screens the security footage for the entire company, publicly humiliating Isabelle in front of colleagues. Isabelle spirals into depression and begins abusing pills as the humiliations pile up.

Christine tries to get Dani fired and types a revenge note on Isabelle's computer that vows vengeance. The scheming tightens the control Christine holds over the situation.

Christine is found dead, marking a shocking turn in the case. Isabelle is arrested and confesses to the murder while in a drug-induced stupor.

Charges against Isabelle are dropped after a ballet-goer confirms Isabelle was seen at the ballet that night, and Dani discovers Isabelle's scarf undamaged in her apartment. The conflicting evidence begins to clear Isabelle of the murder, at least temporarily.

The investigation reveals Dirk had been embezzling money and that Christine had begun to uncover this. A bloody scarf is found in Dirk's car, leading to his arrest.

It is revealed that Isabelle murdered Christine and framed Dirk to cover her own guilt. Dani reveals she secretly captured Isabelle on video during the night of the murder.

Dani, secretly in love with Isabelle, tries to blackmail her into becoming her lover. She uses the captured video as leverage, turning their relationship into a dangerous game.

That night, Dani sends the incriminating video to the investigating detective, escalating the stakes. Isabelle endures a feverish dream in which she strangles Dani after being seduced by her.

Christine's twin sister appears and strangles Isabelle from behind with a bloodstained scarf. Isabelle then awakens in her own bedroom, only to face a new nightmare with Dani dead at the foot of the bed.