Appa movie revolves around three fathers and their sons. The flick is made with the intention to impart a message to the viewers. It is also a take on the private run, residential schools, and private hospitals, etc. It focuses on institutions runs by some individuals.Samuthirakani has portrayed a model father while Kaakha Muttai Vignesh has played the role of his son. The father’s message to his son is that there are a whole big world and life beyond books and studies. Moreover, he also tries to teach him about good and bad things as he can. Also, he provides his son the complete freedom to make his own choices.