In Momentum, Alex Farraday is one of the best thieves, so he is entrusted with complex jobs, jobs that often bring unwanted consequences. One of these consequences is that the law has been pursuing her for some time, so Alex does not stop running.
In addition to running away from the police, she now has to hide from a gang of hit men behind her, because her last hit was complicated and there was a murder in it.
That makes the head of the band of hired killers in a kind of game of cat and mouse, which only live the most astute, although in this case Alex has to lose, being one against a band .
His only trick is to investigate what happened during his robbery and to find out all he can about the people who persecute him, because only then can he have an advantage over them.