Actor So Ji-sub, right, in a scene from SBS drama "Agent Kim Reactivated" / Courtesy of SBS

On the surface, Mr. Kim (So Ji-sub) is just an ordinary, submissive neighborhood man who cares for nothing but his only daughter.

He is a single dad who would rather kneel down and beg for forgiveness before a bully's wealthy parents than cause a scene. But the moment his daughter goes missing, the seal on this middle-aged man is shattered.

Confronting a cocky gang member who claims legal protection under juvenile law, Kim delivers a bone-chilling warning: “When you lose your parents, you're called an orphan. When you lose your husband, a widow. But there is no word for a parent who loses a child. Do you know why? Because the sheer misery and agony leave you with absolutely nothing left to lose. 'Juvenile offender'? Nice phrasing. Then I guess I’ll have to be the 'lawless middle-aged'.”

SBS’s drama "Agent Kim Reactivated," also streaming on Netflix, is a gripping crime noir that follows "Code Name 66" — a former North Korean operative who defected and settled in the South — as he unleashes his monstrous, hidden combat skills against a corrupt nation and giant criminal syndicates.