The film follows a realtor who habitually sneaks into his clients' homes and becomes obsessed with a deceptive social media influencer.

[4] Gu Jeong-tae is a real estate agent with a hobby of peeping into other people's lives by entering their homes using keys entrusted to him by customers.

He becomes interested in and begins to observe Han So-ra, a social media influencer who posts photos of vegan salads while eating convenience store sausages.

To make matters worse, Oh Young-joo, a homicide detective, starts an investigation with all evidence pointing to Jeong-tae as the criminal.

Shin said in an interview that her acting chemistry with Byun matched so well that "there are times when I feel like the wheels are falling into place".