Colter Shaw is in San Francisco, on a mission his late father began but didn't get the chance to finish: finding a courier bag that contains evidence to bring down a corporate espionage firm with blood on its hands. Following the enigmatic clues his father left behind, Shaw plays cat and mouse with the company's sadistic enforcers, as he speeds from one gritty neighborhood in the City by the Bay to another. Suddenly, the job takes on a frightening urgency: only by finding the courier bag can he expose the company and stop the murder of an innocent family. With the help of an unexpected figure from his past, Shaw narrows in on the truth-and learns that the courier bag contains something unexpected: a long-buried secret with catastrophic implications.