But his affection for his wife has subsided long ago, and due to post-traumatic disorder from the Vietnam War, he suffers mental breakdowns and nightmares of the fallen soldiers under his command.

One day, Captain Kyung Woo-jin is transferred to Jin-pyong's troop and he moves in next door with his wife Ga-heun.

She begins to develop cordial feelings for Jin-pyong for risking his own life to save her from the vicious attack.

He gets drunk by the end of the night, and not being able to contain his feelings any longer, he shouts why she had to leave him, completely exposing their secret affair to the entire army.

In a fit of rage for insulting his daughter, his father-in-law decides to send Jin-pyong back to Vietnam.

Two years later, while attending an official party, a group of Special Unit men from Vietnam approach Ga-heun.

[6][7] When the film studio uploaded racy teaser photos from the movie on April 24, 2014, more than 4.7 million people logged onto the official website.

Industry insiders noted that the interest in the film was remarkable, because the marketing team wasn't able to conduct any promotional activity due to the recent sinking of the MV Sewol incident.

The hype was mostly attributed to actor Song Seung-heon, since Obsessed was his first R-rated romance film.