There Will Be Blood is a 2007 American epic drama film written and directed by Paul Thomas Anderson. The film was inspired by Upton Sinclair's 1927 novel Oil! but is too different to be considered an adaptation. It tells the story of a silver miner-turned-oilman on a ruthless quest for wealth during Southern California's oil boom of the late 19th and early 20th centuries. It stars Daniel Day-Lewis, Paul Dano, and Dillon Freasier.