On the surface, the relationship between Kristen (Kristin Scott Thomas) and Isabel (Ludivine Sagnier) is simply a model of the relationship between a boss and a subordinate, but in fact, deep resentment has already taken root between the two. For Kristen, Isabel's talent is her cash cow. Through a series of unethical means, Kristen used Isabel to gain huge benefits for herself. For Isabel, the boss's arrogance and strength always oppressed her and made her unable to turn over. There seems to be no end to her life of enduring anger every day. The repressed contradictions will always erupt one day. In order to retaliate against Kristen, Isabel planned a meticulous murder. Can Isabel really be so cruel? Will her plan succeed?