After seeing off his beloved niece, whom he had raised following the tragic accident that befell his brother and sister-in-law, Police Inspector Seo Gun-seok is left feeling aged, weary, and empty. His life takes an unexpected twist when an unforeseen visitor arrives on the scene. Cho Jun-heon, a name intertwined with painful memories, reenters his world. In their shared past, Gun-seok had watched Jun-heon grow up as a childhood friend of his niece. He even imparted his knowledge of marksmanship to Jun-heon, which eventually led the young man to pursue a career in competitive shooting. However, the last memory Gun-seok holds of Jun-heon is the rejection of the university student’s affection. Six years later, Jun-heon resurfaces in Gun-seok’s life, transformed and seemingly concealing something behind his constant flirtations with the police inspector.