Not Others

An immature mother, Eun-mi, and her daughter, Jin-hee, live their daily lives like sisters. Jin-hee works at the Wolsan Police Station, and due to an incident, she is unjustly demoted to calm public opinion. Jin-hee goes home looking forward to drinking cold beer with her mother, but she sees something she had never imagined.

While doing her first patrol for the Namchon Police Station, Jin-hee hears a report of a burglary at their house, and Eun-mi manages to catch the culprit. However, upon hearing the reason for the theft and that the culprit will not be detained since it's his first offense, Eun-mi, the "neighborhood crazy bitch," takes matters into her own hands.

While examining Mrs. Na, a patient who came to the orthopedic clinic, Eun-mi sees bruises at her back and tells Jin-hee that she suspects domestic violence. They also suspect that Mrs. Na's grandson was also abused. Eun-mi, who hates people who hit their family, gets angry again.

Jin-hee tries to adapt to the Namchon Police Station, but it doesn't go her way. After their first get-together, Jin-hee accompanies a drunk Jae-won home, and they talk about something unexpected. Meanwhile, a suspicious person is seen around the woman Eun-mi saved.

A man keeps on following Eun-mi. After the recent murder case, Jin-hee becomes anxious and tries not to leave Eun-mi alone, but she is worried because a strange man, Park Jin-hong, keeps wandering around their apartment. Meanwhile, Jin-hong stops by the orthopedic clinic for a treatment.

Jin-hee is shocked by Eun-mi's revelation. When she was a child, Jin-hee didn't meddle on her mother's relationships, afraid that she would be like a poop that's attached to a goldfish, but now, she tells her mother not to meet with Jin-hong. Eun-mi, on the other hand, continues to meet him!

Jin-hee planned a mother-daughter trip to make up with Eun-mi, but nothing seems to go her way when Jin-hong suddenly shows up and disrupts her plans. On the trip, Jin-hong keeps on tiptoeing between the uncomfortable Jin-hee and unreadable Eun-mi.

Eun-mi is attacked by a man in a baseball cap while walking at night. Jin-hee belatedly gets a call from Jae-won and rushes to the police station where Eun-mi is. Seeing Eun-mi in a mess, Jin-hee hates herself for not being able to protect her mother. But she becomes more resentful toward Jin-hong, who promised that he will protect Eun-mi.

Eun-mi encounters Ji-eun, the bully of her school days and Jin-hong's younger brother, and a strange war of nerves ensues. Eun-mi draws a line at Ji-eun telling her not to take an interest in Jin-hee. Meanwhile, Jin-hee suspects that there is another culprit who attacked her mother and asks Jin-hong to help ensure Eun-mi's safety. In front of Jin-hee, who seems to have opened up a little to Jin-hong, a maternal aunt... or maybe a paternal aunt appears.

A real culprit may be after Eun-mi. Despite opposition from the main office, Jin-hee and Jae-won accelerates their investigation into the culprit. The team members, who have become close after solving the single-parent assault case, also help Jin-hee in their own ways. Jin-hee secretly continues her investigation for Eun-mi's sake, only to find herself hiding more. Meanwhile, it seems that someone is constantly watching this mother and daughter duo...

Jin-hee and Jin-hong take utmost care of Eun-mi following the attack, which brings the three of them closer. Meanwhile, Jin-hong's parents suddenly appears and encourages Jin-hong to marry Eun-mi, believing it would be a better choice for Jin-hee. However, this family seems to have differences at every turn. Is this marriage really a good idea?

Just after the commotion caused by the appearance of Jin-hong's parents, Eun-mi and Jin-hee experience their first family loss when Mi-jung and Eun-mi's mother passes away. They might not have shared blood, but she was Eun-mi's mother and Jin-hee's grandmother. Jin-hee, who becomes restless, starts to contemplate being independent. Can Eun-mi and Jin-hee, who have never been apart, be able to go their separate ways?