A 38-second-long teaser ad caught viewers’ eyes by featuring a bruised Rain/Bi, who plays a K-1 fighter in this latest K-drama, against the backdrop of a cloudy sky in the heart of a city, and his co-star Sin Min-ah against a clear blue sky at the seashore. The teaser was produced in the form of a wide aspect movie-like screen. The final scene of the teaser showing Rain shedding tears seemed to particularly impress fans...

Top star Bi portrays a character who's brother attempted suicide but ended up in the hospital with brain dead. He has one thing in mind, that's "revenge" for his brother. Therefore, he ends up being the bodyguard of an actress named Cha Eun-sook (Shin Min-ah). Despite his reasons (revenge) for taking up the job, Eun-sook's bodyguard ends up falling in love with her..