A salaryman working at a top trading company enjoys a smooth career and a happy marriage. During a company mixer, he meets his wife and celebrates the beginning of a new romance. However, his wife, Rin, is secretly having an affair with a male colleague from work. While hiding her infidelity, she continues the illicit relationship openly in front of her husband without remorse. Though initially filled with anger, the husband begins to undergo a profound psychological transformation. Watch as the shock of betrayal reshapes his emotions in unexpected ways.