Husbands in Action

At a school event, narcotics inspector Hwang Choong-sik meets Lee Min-seok, his ex-wife Si-nae's new husband, sparking an immediate power struggle. The veteran investigator and the young veterinarian clash in both personality and family roles, as ex-husband versus new husband and father versus stepfather to their daughter Yeon-ju.

The rivalry ends temporarily when Si-nae and Yeon-ju are abducted, compelling Choong-sik and Min-seok to collaborate on their rescue. Their differing temperaments cause repeated conflicts throughout the operation.