BELL RINGER: THE INVISIBLE BRAIN INJURY dives into the complexities of the injured brain, examining what occurs in the brain during a concussion, how researchers are studying physical impact and neurological injuries, and the safe protocols for returning to play. Through eye-opening interviews with former professional players, including women’s soccer legend and two-time World Cup Champion Michelle Akers and three-time Super Bowl Champion Monte Coleman (both of whom suffered multiple concussions during their careers), as well as medical experts and renowned researchers, the documentary examines the short-term effects and long-term risks of concussions, raises awareness of the issue, and discusses the best ways to prevent them altogether.