Storyline:
Kim Eun-Mi (Jeon Hye-Jin) became a single mother when she was a high school student. She raised her daughter Jin-Hee by herself. Now, Kim Eun-Mi is in her 40's and she lives with her 29-year-old daughter Kim Jin-Hee (Sooyoung). Kim Eun-Mi works as a physical therapist and Kim Jin-Hee works as a police officer at the Namchon Police Substation. Kim Jin-Hee bickers with her mother over everything, but they have a strong family bond. One day, a mysterious man Park Jin-Hong (Ahn Jae-Wook) appears in front of Kim Eun-Mi. He works as a doctor. Meanwhile, Eun Jae-Won (Park Sung-Hoon) gets demoted to the Namchon Police Substation. He doesn't get along with Kim Jin-Hee at all.