Rise of Power: Dad, Your Son Comes Back — Episode 20

Protagonist, once tycoon's son, kidnapped by adopted brother, separated from family. Joins Hidden Wolf Special Forces, becomes Wolf King captain. Just before reunion, adopted brother poisons him. Injured and amnesiac, saved by sister. Eighteen years later, tycoon tracks him to Yang City. Butler brings him home, but adopted brother intervenes, holding sister hostage.