Simon gets the shock of his life when his mother dies tragically in a hit-and-run accident, leaving behind a secret that Simon is desperate to discover. But, how can Simon decipher the mystery of the eleventh sense when the worst bully in school history pounds on him every day, his stepfather won't even look at him, and the killer is still on the loose? Just when Simon thinks things can't get any worse, he accidentally discovers his mother's mind-blowing secret in a way that changes his life forever. Will Simon succeed in his quest? He just might, with the help of the most unexpected bunch of friends anyone could ever want.