Directed by acclaimed cinematographer Reed Morano and based on the 1999 novel of the same name written by Mark Burnell, The Rhythm Section is your fairly average action flick with a quite predictable plot but is marked by a terrifically dynamic acting performance given by Blake Lively and has some beautifully shot action sequences. The story follows Stephanie Patrick, played by a gritty and emotionally distraught Blake Lively, who was a typical British citizen until she loses her entire family and eventually embarks on a vengeful and very violent mission targeting those responsible for her parents’ and siblings’ deaths in a plane crash. Officially declared a plane crash resulting from a mechanical failure, Stephanie learns from a freelance journalist that the crash was actually the work of a terrorist group who planted a bomb on the commercial airliner killing all aboard. On her own, she discovers the journalist’s confidential source is a former MI6 agent named Iain Boyd, played by Jude Law, hiding out in the remote countryside of Scotland who begrudgingly agrees to train her to be an assassin and have the skills to go after her family’s killers. Eventually, she travels around the world tracking down and killing everyone connected to the terrorist attack. Along the way, she meets several mysterious individuals, including a shadowy figure living outside Madrid, Spain who traffics in secret information named Mark Serra, played by Sterling K. Brown. Although there are several quite well-done and gripping action scenes that are clearly influenced by the filmmaker’s experience as a cinematographer with its use of frenetic camera work, the film suffers from an unnecessarily slow pace that wallows too much in the anguish and grief of Blake Lively’s very troubled character. Furthermore, the plotline, especially the ending revealing the real bad guy, is way too predictable to make for a genuinely unique action flick. Despite all of the movie’s flaws, Lively should be praised for her physically grueling and dedicated performance that feels extremely raw and realistic as if she really did live those feelings of profound loss and desire for revenge at all costs. Overall, I was fairly disappointed that it did not meet my expectations, established by the movie trailer, for a very entertaining and dramatic action thriller; even with Blake Lively’s terrific performance that could make for a turning point in her acting career, the movie is unable to really recover from the poor pacing and lack of originality.