After unwittingly stealing money from a cartel, a cash-strapped professor finds the only way to save his broken family is by working as a drug courier.
Song Yeo-wool, a widow who has been falsely accused of her husband’s murder, goes on a dangerous path to discover the truth about her husband’s death, while facing great judgement from the society. With this charge and allegation on her, she gets near about losing everything and becomes devastated. Meanwhile, the parents of students of international school where Yeo-wool’s son studies, starts to spread rumors about Yeo-wool.
Love Alarm is an app that tells you if someone within a 10-meter radius has a crush on you. It quickly becomes a social phenomenon. While everyone talks about it and uses it to test their love and popularity, Jojo is one of the few people who have yet to download the app. However, she soon faces a love triangle situation between Sun-oh whom she starts to have feelings for, and Hye-young, who has had a huge crush on her.