Three years into her marriage to a husband who works as a used car salesman, Naho works at the same company as a receptionist. Due to her assertive personality, she secretly goes beyond clerical duties and actively participates in workshop operations. One day, a mistake made by Naho leads to a customer complaint about faulty maintenance. Unaware of her error, her husband cancels the contract with the outsourcing workshop, leaving Naho overwhelmed with guilt over the consequences. Gradually, this guilt transforms into recurring nightmares that torment her relentlessly.