H.W. Plainview is a fictional character from the film There Will Be Blood, directed by Paul Thomas Anderson. He is the son of the main character, Daniel Plainview, and plays a significant role in the story, which revolves around the oil industry in early 20th-century California. H.W. is portrayed as a young boy who is deeply affected by his father's ambition and the moral complexities of their life. Throughout the film, H.W. experiences the challenges of growing up in a harsh environment shaped by greed and competition. His relationship with Daniel evolves as the narrative progresses, highlighting themes of family, loyalty, and the impact of ambition on personal connections.