A man falls from a mountain peak and dies. The detective in charge of the case, Hae-joon (PARK Hae-il), goes to meet the victim’s widow. Seo-rae (TANG Wei) shows no sign of being shaken by the news of her husband’s death. With her behavior so different from that of a grieving relative, the police consider her suspicious. Hae-joon interrogates the unreadable Seo-rae and, as he watches her, he feels himself developing an interest in her.
