watch X-men First Class full movie online HD 123movies, $title full movie online Gostream plot:Following the classic Marvel mythology, this films unveils the epic beginning of the X-Men saga. As a reboot, X-Men: First Class re-imagines mutant power with the kind of youthful. The films provides answers to questions when Professor X and his followers first battled Magneto and his Brotherhood of Mutants. As the first class discovers, harnesses, and comes to terms with their formidable powers, alliances are formed that will shape the eternal war between the heroes and villains of the X-Men universe..