No Activity follows the work of a number of people who all in one way or another have something to do with a large drug operation by the police. Two low-ranking officers, Detective Nick Cullen and Detective Judd Tolbeck, spend a lot of time together as they regularly perform lengthy surveillance jobs. In addition, two criminals are followed who do not quite know what the intention is. Two officers from the police control room do not work well together and two Mexican tunnellers get stuck in a small space.