Killers of the Flower Moon is a 2023 American epic anti-Western crime drama film produced and directed by Martin Scorsese, who co-wrote the screenplay with Eric Roth. It is based on the 2017 book of the same name by David Grann. Set in 1920s Oklahoma, it focuses on a series of murders of Osage members and relations in the Osage Nation after oil was discovered on tribal land. The tribal members had retained mineral rights on their reservation, but a corrupt local political boss sought to steal the wealth.