Twenty-five-year-old Ko dreams of becoming a teacher. As a child, she was saved by Chaichana, an event that made Ko want to be a good teacher like Chaichana. However, she comes to question what it is to be a good teacher. Ko becomes a teacher as she had hoped, but being a teacher is not easy when she has to face with the education system and the administration of Phatham School.
Goh survives a bus accident thanks to the heroic act of Teacher. Teacher Chaichana's sacrifice inspires Goh to become a teacher, and she successfully becomes a teacher at Phatham School. However, her entry as a teacher is accused of being due to favoritism because her aunt is a school administrator.
Goh is accused of getting the job unfairly,Goh is assigned to the guidance department, led by Teacher Rubkwan, who doesn't like her much, In her early days as a teacher, Goh has to overcome many challenges, but teacher Rubkwan gradually starts to see her in a better light.
Goh's struggles help old-school Pawinee embrace new teaching methods.Despite heavy workload and time management issues, Goh's efforts make the school's Open House a success, but rumors about her connections intensify.
Goh's contract is renewed for only six months, but Rubkwan inspires her to stay. A brochure Goh made causes a major problem at an event, as it mentions a Salaya University quota that doesn't exist.
The guidance department promotes a non-existent Salaya University quota, pressuring Rubkwan to secure it. Go, Thawin, and Pol visit Salaya and are rejected by Assistant Professor Worawan, a former Phatham teacher with a grudge.The principal plans a gifted program instead.
Goh is chosen as homeroom teacher. Rubkwan struggles to secure the Salaya quota. Goh observes teacher Juad selecting only top students for the gifted program. Meanwhile, teacher Sumeth finds evidence that teacher Yong posted attacks on the school.
Goh's workload doubles with the gifted program. During midterm exam preparation, Chaiwat accidentally reveals he used questions from his tutoring school, which Nicha overhears, feeling it's unfair. Yong, caught by Sumeth for school attacks, and he's falls ill from overwork.
Student and parent protests erupt over an ambiguous exam question. Goh proposes a score adjustment, but senior teachers refuse. Nicha, answering incorrectly, confronts Chaiwat again, reigniting protests. Goh and Thawin seek correct answers, and her suggests all teachers apologize.
Rubkwan successfully arranges a collaboration with Salaya University. However, Dr. Peerapol can't attend, sending Worawan instead. Thawin, knowing her holds a grudge against him. With help, he clarifies the misunderstanding, convincing Worawan to attend for the students' benefit.
Teacher evaluations begin with gifts and flattery. A new policy allowing parents to call teachers directly causes an uproar. Most teachers receive low scores, which are then mysteriously adjusted to "good." The gifted classroom is vandalized, baffling everyone.
The gifted classroom is vandalized and Din is wrongly suspended. When his and Kongthun's university activity rights are revoked an enraged Kongthun vandalizes the classroom again, revealing himself as the culprit. Din and Kongthun resign, feeling the school isn't for them.
Goh understands guidance better. Gifted students Tae and Nicha meticulously prepare portfolios, but none get into top universities. Goh tutors them, but overwork makes students ill. Nicha gets accepted to Chula Medical, but her mother's severe illness makes her rethink accepting the quota.
Nicha forfeits her quota to care for her sick mother. Goh supports her, but Mongkol and Juad pressure gifted students to aim for top universities. Yong confesses Goh past attacks. Gifted students achieve good results, with Tae entering Chula Medical, but other successful students are overlooked.
Opening a new academic year, Goh and Yong are not selected as permanent teachers; Piyanat takes the position instead. Mongkol is promoted to principal, leading to many changes at the school, especially for Goh, who is assigned to oversee the Gifted Classroom with Piyanat.
Thawin struggles with teaching and TV work. Goh helps his and using unique methods that delight students, including a scholarship for Sam, pleasing Principal Mongkol. Goh's invitation to Din to speak to 6/7, leading students to drop out, believing school isn't their path.
Principal Mongkol, offers her a homeroom teacher position. However, Goh resigns to pursue her dream of an alternative school, supported by Supha, she offers she home. While building her school. Meanwhile, at Phatham School, a gifted student's suicide leads to Principal Mongkol's resignation.