Three female friends, who come from totally different backgrounds, encounter enemies that they want to kill. Gong Ma Ri is a housewife and she has a satisfying life with her husband and daughter. She learns that her husband is having an affair. Gong Ma Ri seeks an alternative method to end her marriage. Chae Hee Soo is a daughter-in-law of a chaebol family. Her marriage life is not going very well. She takes care of her mother-in-law, who is physically unwell and suffers from Alzheimer's. Chae Hee Soo endures her husband’s indifference to her and she also experiences difficulties in becoming pregnant. One day, her mother-in-law gives her a terrifying, but tempting offer. Yang Jin A's husband is not a good person. Her husband's death leads her to collect large amount of money from his life insurance policy. With that money, Yang Jin A is able to live a different life than what she was previously accustomed to. However, Yang Jin A tries to protect her money and suffers from anxiety that her money will be taken away by someone.