There was a secret in Mina, a housewife who lives happily with her husband and father-in-law. Mina, who hides behind her husband and likes her father-in-law, takes care of her father-in-law while also giving her "sexual care". However, one day, when her father-in-law was injured during her absence, her husband decided to move her father-in-law into a facility in a hurry. The time left for the two to move in is four days. The actions of Mina and her father-in-law crossed the line and developed into a mistress relationship that sought each other to burn.
