After seven years of marriage, Yuna catches her husband Miles having an affair with her best friend Zoe. With her heart completely shattered, she changes her name to Sunny, erases all traces of her old identity, and flees to a distant land. It is only after losing her that Miles comes to his senses. He spares no effort to track down his wife, consumed by remorse and longing for forgiveness. Blinded by jealousy and hatred, Zoe launches a violent attack with her car. Miles throws himself in front of Sunny to shield her and ends up paralyzed from the incident. In the end, he chooses to let go, stepping aside to let Sunny run toward the bright, sunny life that is truly hers.