Cha Jung Han is a detective for a special investigation team. He is busy with investigating violent cases including drugs and gangs, but one day he takes in his niece, Eun Ae and struggles to raise her. Meanwhile, Han Ye Seul is a single mother who raises her 5-years-old son alone. She is Cha Jung-Han’s first love.

• Oh Ji-ho
• Kim Min-jae
• Son Ji-hyun
• Lee Soo-kyung
• Jeong Soo-young
• Koh Soo-hee
• Tae Hang-ho