The story is a tragedy during Taiwanese white terror period.(1949-1991) During this period the freedom of assembly and association are strictly forbidden. In this film, many people are sentenced to death for the reasons which are considered far from crimes today. The budget of this movie is less than 3 million US dollar. However the quality of this movie is much way better than it's cost. Good script. Good casting. Good directing. Good sound design. Good scoring. And excellent production design! Especially it was adapted from a computer game with the same title "Detention". It is very hard to adapt a computer game to a film, but they made it! Though the story still has some pacing problems, it's still an excellent work with this budget. I enjoyed this film very much.