Zero Effect is a 1998 American mystery comedy film written and directed by Jake Kasdan in his feature directional debut. Starring Bill Pullman as "the world's most private detective", Daryl Zero, and Ben Stiller as his assistant Steve Arlo, the film's plot is loosely based on the Arthur Conan Doyle short story "A Scandal in Bohemia". Shot in Portland, Oregon and scored by The Greyboy Allstars, the film was screened in the Un Certain Regard section at the 1998 Cannes Film Festival. The film did not perform well at the box-office grossing $2 million with a budget of $5 million. Plot Daryl Zero is the world's greatest detective, but is also a socially maladroit misanthrope. Among his quirks is that he never meets or has direct contact with his clients, instead conducting business through his assistant, Steve Arlo. Throughout the movie, Zero provides narration as he reads lines from his proposed autobiography. Zero and Arlo are hired by Portland area millionaire Gregory Stark, who has lost the key to a safe deposit box and is being blackmailed by an unknown person who forces him to follow elaborate instructions to deliver the cash payments. Zero quickly discovers that the blackmailer is Gloria Sullivan, an EMT with a mysterious past. Zero becomes attracted to Gloria and they sleep together, compromising his trademark objectivity. He lets his guard down and tells her that his abusive father killed his mother and himself. Stark pressures Arlo to reveal the blackmailer's identity so that he can have that person killed. Arlo must also deal with Zero's absurd demands on his time, which increasingly interfere with Arlo's relationship with his girlfriend Jess. Zero eventually discovers that Stark had raped Gloria's mother after she broke up with him. She later blackmailed Stark with the threat of exposing him as a rapist, so he had her killed. However, she had already given birth to their daughter Gloria, who was discovered and raised by the hitman who killed her mother. Gloria grew up knowing that Stark was behind her mother's murder, and when her adoptive father (the hitman) contracted a terminal illness, she used the information to blackmail Stark, using the money to pay for medical treatment. At the meeting to deliver the final blackmail payment, Stark collapses from a heart attack and Gloria is compelled to save his life. She then flees the country with Zero's assistance. Cast Bill