There are two teachers who teach at the same rural school in different time periods. The school lacks basic amenities like running water and electricity. The first teacher, Ms. Ann, documents her struggles in a diary that the second teacher, Mr. Song, discovers after she has left. Inspired by Ms. Ann, Mr. Song works to earn the trust of the few students at the school and searches for Ms. Ann to learn more about her. The isolation of teaching is discussed, as teachers spend most of their time alone with students and have few opportunities to collaborate with colleagues.