Jo Gang Ja grew up in an environment where she developed a lot of bad habits and due to her lack of manners became a troublemaker at school. Years later, she is a mother of a teenage daughter and is working in gastronomy, yet her behaviour didn't significantly change over the years and even her customers notice her short temper.
One day, Gang Ja discovers that her daughter became the target bullying and decides to help her. For that purpose, she sneaks into school in school uniform and pretends to be a student.
Angry Mom manages to successfully do what very few shows can achieve: blending comedy with grim reality, all while keeping the characters and story rooted.
The premise of the show is inherently funny. You have a 30 something mother who goes back to play a high school, to her teenage daughter's mortification. And there's plenty of hijinks associated with the premise.
But the show also goes grim and dark, tackling bullying. No punches are pulled here, the reality of what harsh bullying and power abuse can result in is never held back. But the show expertly walks a fine line that keeps it from sinking too deep into the darkness but without shrinking how harsh reality is.