In a world where technology has made it easier to uncover secrets, a private detective is hired to solve a murder case that leads him down a dangerous path. As he delves deeper, he discovers a web of lies and conspiracies that threaten to consume him. With the help of a brilliant hacker, he must stay one step ahead of a serial killer who has evaded capture for 25 years. The investigation becomes a race against time as they uncover a sinister plot that could change the course of humanity forever. Will they be able to stop the killer before it's too late?

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Some movies that have similar genres and were produced around the same time as One Step Ahead include Killers of the Flower Moon, Secret in Their Eyes, Nope, Last Seen Alive, Thanksgiving, The Killing of a Sacred Deer.