Well originally I thought this was a Korean rewrite of the original movie "Finding Forrester". In that movie it was about bitter old man who lost his brother and was considered a literary genius. He befriends a young man with huge potential but an education system that wants to just use him for what they need him for and the main bad guy is a stuck up literature teacher who was a failure in every sense of the word. Needless to say both stories are virtually identical in general plot the writers of "In Our Prime" ended up changing literature to math but essentially had the same story. But I will say that the Korean movie tended to show how the Korean education system seems to value getting money from "rich" people instead of actually wanting to teach students to strive for personal goals and achievements. It's sad that the educators in this movie wanted to cover up a scandal that essentially made them all accessories to the facts but they were too concerned about saving face and would actually throw an actual "poor" student underneath the proverbial bus because it was easier than to actually set an example to the students and tell the truth. The 3 main characters were amazing actors I'm not familiar with of them except for the actor who played the North Korean defector. Even with the pain and sadness when he thought of what he had taught the student he came back with courage and ended up finding a new path and a new life. Excellent movie. A little sad that I've seen so many Korean movies that seem to make their education system seem very corrupt and dishonest.