A film drama that combines the merits of a film and a drama consists of three buses: 8 Years, The Child Who Wouldn't Come and Karma.

Once a legendary detective and a new mom, Mi-young, now works a desk job. But when overenthusiastic newbie Ji-hye is assigned to Mi-young's civil complaints team, the two female cops get caught up in a serious criminal case that triggers an action-filled comedic investigation.