Christine, an American advertising executive working in Germany, is working with her protege Isabelle on an ad campaign for a new smartphone. Isabelle, who is secretly having an affair with Christine's boyfriend Dirk, comes up with a well received marketing idea. When Christine claims it as her own, Isabelle is disappointed but reconciles with her boss when Christine shares the story of how her twin sister died. At the urging of her loyal assistant Dani, Isabelle uploads a self made version of her ad to the web, where it goes viral. Angered at the attention Isabelle has received, Christine vows revenge, taunting her with a sex tape which Isabelle had made with Dirk. After an angry Isabelle crashes her car in the company parking garage, Christine shares the security footage with the rest of the company, humiliating Isabelle who spirals into a depression and begins abusing pills. Christine tries to get Dani fired and then threatens Isabelle with a letter she typed on Isabelle's computer vowing revenge.