A man falls from a mountain peak to his death.
The detective in charge, Hae-joon (PARK Hae-il),
comes to meet the dead man's wife Seo-rae (TANG Wei).
"I worry when he does not come back from a mountain,
thinking he might die at last."
Seo-rae does not show any signs of agitation at her husband's death.
With her behavior so unlike that of a grieving relative, the police consider her a suspect.
Hae-joon interrogates Seo-rae,
and while observing her on stakeout,
feels himself slowly developing an interest in her.
Meanwhile the difficult-to-read Seo-rae,
despite being suspected of a crime,
acts boldly towards Hae-joon.
A suspect who is hiding her true feelings.
A detective who suspects and desires his suspect.
Their Decision to Leave.