Daniel Plainview is a fictional character from the 2007 film "There Will Be Blood," directed by Paul Thomas Anderson. He is portrayed by actor Daniel Day-Lewis. Plainview is an ambitious oilman in the early 20th century who seeks to acquire land for drilling. His relentless pursuit of wealth and power drives the narrative of the film. Throughout the story, Plainview's character evolves, revealing his complex personality marked by greed, manipulation, and a deep-seated loneliness. His relationships with others, including his adopted son and rival Eli Sunday, highlight the moral ambiguities of his quest for success in the oil industry.