A former special forces soldier delivers revenge for victims of injustice while working for a secret organization that fronts as a taxi company.

Jung-woo, unfairly ostracized from the literary world, finds refuge with Jung-hyun, a respected senior. Years later, their codependent lifestyle is disrupted by Tae-young, a young publisher seeking to publish Jung-woo's comeback novel.

Haesung swoons over her guy friend's huge charm in his underpants.