This drama is set at a small police station. A single mother struggles to raise her daughter while working as a police. A rivalry then formed between her and a valedictorian policeman who dedicates himself fully to his job. Moo Goong Hwa is a former boxer. After the death of her husband, she has raised her daughter alone. She now works as a police officer. Cha Tae Jin is an elite police officer who graduated from the police university. He is full of justice.