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"DoReMi Market" blends music, food, and fun with celebrity guests and unique games.

Internal Affair team has been disgraced while investigating a bribery case against the Police Commissioner and racer-turned-entrepreneur Jung Jae-chul. The second-in-command of the IA team, Lieutenant Eun Shi-yeon, is relegated to the Hit and Run Squad at Inchon PD. She meets Squad Captain Woo and constable Seo Min-jae, who has a natural instinct for cars and delinquent past. Eun also gets acquainted with Seo's family, who have met through car accidents. A hit and run case leads the squad to Jung as a prime suspect, Eun conducts a separate operation to acquire the black box in Jung's concept car. Jung, a reckless speed freak, chases Eun and it leads a tragic accident, costing someone's life. When Eun finds out the dirty deal behind her back, she cooperates with Seo to finally bring justice to Jung.