Watch Online Free on Watchseries. Nguyen Trong Hieu is nicknamed the German Hot Guy. Especially the numerous female fans are crazy about the singer who calls himself (S)TRONG. In Vietnam, he is a superstar – and that as a German. His biggest dream is to become successful in his German homeland. We accompany his journey between two worlds, two careers, two identities, and at the same time immerse himself in the origin stories of the Vietnamese and Vietnamese living in Germany.