Watch Upgrade full movie online Movies123. Watch Upgrade 123movies online for free. Upgrade 123Movies: A brutal mugging leaves Grey Trace paralyzed in the hospital and his beloved wife dead. A billionaire inventor soon offers Trace a cure â€” an artificial intelligence implant called STEM that will enhance his body. Now able to walk, Grey finds that he also has superhuman strength and agility â€” skills he uses to seek revenge against the thugs who destroyed his life.