Yoko is a woman blessed with a husband, a child, and a smooth sailing life as a doctor. The morning after she and her husband return from a business trip in Sapporo, lipstick falls out of his pocket. Though she pays no attention to it, she later finds a long brown hair on her husband's scarf that doesn't belong to her. She wants to believe in the husband that she loves but she can't shake the feeling of distrust. Soon, her world feels like it's crumbling around her. What is the one thing you don't want to give up in a divorce? A heroine's fierce revenge begins.