Question: Please answer the following question about this movie plot. If it's un-answerable, please output "No answer".  Question: What is fruitless? Movie plot title: Narc Movie plot: Undercover narcotics officer Nick Tellis (Jason Patric) chases a drug dealer through the streets of Detroit after Tellis' identity has been discovered. During the pursuit, the dealer holds a child hostage. Tellis shoots and kills the dealer before he can hurt the child, however a stray bullet hits the child's pregnant mother, causing her to miscarry. Eighteen months later, the Detroit Police Department asks Tellis to investigate the murder of an undercover narcotics officer called Michael Calvess. Tellis is initially reluctant, as there is little else he can do for a living however, he reads the investigation files and agrees to take the case, on two conditions. The first: he will get a desk job if he secures a conviction. The second: he is partnered with detective Henry Oak (Ray Liotta), whom Tellis is aware of through reading the files on Calvess' death. Tellis' reason for wanting Oak is his opinion that the only useful evidence in the investigation came from him. The department chief informs Tellis of Oak's reputation as a driven and effective policeman, but also warns him about his instability. Despite his reservations, Oak is assigned to the case. The two build a rapport during a violent investigation. Oak is a dedicated but haunted cop who uses brutal force on criminals, who believes the department want the case buried. During the investigation, Oak reveals that his wife died of cancer, and they had no children. He recalls a drug bust decades prior, where he found a ten-year-old girl naked who was being sold for prostitution by her stepfather for rent money, resulting in Oak beating the man bloody. He sees parallels between that case and the current one. Meanwhile, Tellis' wife is worried for her husband's well-being. Tellis visits Calvess' widow Kathryn, and asks about her and her husband's relationship when he was on the street. Oak turns up at the house and is furious at Tellis as Kathryn has been persistently interviewed by police. He is protective of Kathryn and her children's safety. Tellis and...
Answer:
Lead