Under The Rain depicts a love story of a woman named Sokha, aged 18, who studies at a university located in a rural area. Sokha lives with her mother and her step father who is a good man. Sokha's beauty attracts men who stalk her but she only loves a man called Lat who is a son of a businessman in Phnom Penh (Capital city of Cambodia) and also a university student. His interests are in painting and photography at rural area. Their love is known and accepted by elders of their families. However, one day they get separated because of an argument. Lat will study and live at United States for years. Sokha got pregnant before Lat leaves. After breaking up, each of them gets married to different person. Without a knowlege of his baby, Lat met many issues once returning to the Sokha's hometown, but finally Sokha and Lat manage to explain one another.