The drama follows an ordinary soldier named Ahn Joon-ho who is doing compulsory military service like other young men of his age. Suddenly he is sent to a special squad, which is engaged in the pursuit and capture of deserters.
Ahn Joon Ho (Jung Hae In) is a quiet and calm young man who does not know how to adapt to new situations. His ability to oberserve and patience has caught the attention of Sergeant Park Beom Goo, he becomes part of the D.P. (Deserter Pursuit) team.
Han Ho Yeol (Goo Kyo Hwan) is the leader of D.P. Although he looks like a playboy with no ambition, he sometimes gives An Joon Ho investigative know-how, but he sometimes annoys him.
Sergeant Park Bom Goo (Kim Sung Kyun) is the officer in charge of the D.P. team. He suffers from severe stress and chronic fatigue, often scolds Ahn Joon Ho and Han Ho Yeol, but at the same time takes care of the team.
Im Ji Seop (Song Seok Gu) is a military police officer who graduated from the military academy. He only cares about good results and believes that the D.P. team is getting in the way.
Adapted from the webtoon “D.P Dog Day” (D.P 개의 날) by Kim Bo Tong (김보통).
Also known as: D.P 개의 날 D.P Gaeui Nal Deserter Pursuit Dog Day / Day of the Dog / D.P Dog Day