코유리는1년전남편과사별한언니사유리가늘걱정이다.                                  새로운남자를소개시켜줘도거부하는언니.                                  하지만사실사유리는코유리의애인고로에게호감이있었던것뿐!                                  사유리는위로를핑계로동생의애인에게접근하고고로또한사유리의저돌적인유혹에점점빠져든다.