Risa, a housewife working as a domestic helper, struggles daily to support her husband who can no longer work due to illness. One day, she is sent to a new assignment and unexpectedly reunites with her ex-boyfriend, Takeshi. Irritated by his arrogant and condescending attitude, Risa finally gathers the courage to cut ties with him. However, Takeshi harbors deep resentment over the rejection, and what follows is a twisted spiral of revenge, blackmail, and humiliation. As their paths continue to cross, their relationship grows increasingly dark and complicated.