In the crime comedy-drama film Inherent Vice, Katherine Waterston stars as Shasta Fay Hepworth, the ex-girlfriend of private investigator Larry "Doc" Sportello (played by Joaquin Phoenix). Set in 1970s Los Angeles, the film follows Doc as he investigates the disappearance of Shasta's current boyfriend, a wealthy real estate developer. As Doc delves deeper into the case, he uncovers a complex web of corruption, drugs, and conspiracy. Waterston's portrayal of Shasta Fay Hepworth earned her critical acclaim, with her performance capturing the enigmatic and alluring nature of the character. Inherent Vice showcases Waterston's ability to bring depth and complexity to her roles.