Secretly and Dangerously

Boss, who is living in Saipan with his mistress Min-ji, temporarily returns to Korea to avoid suspicion from her while he is enjoying secret affair. Meanwhile, Sang-hoon, a handyman who secretly longs for Min-ji, watches her from afar. Perhaps out of loneliness, Min-ji begins to take notice of Sang-hoon, who has always had eyes only for her. Despite knowing the inevitable consequences of betrayal, Min-ji and Sang-hoon are drawn to each other. Having left Min-ji behind, Boss sends a hitman to Saipan to keep an eye on them.