When you're the fastest hero around, it becomes second nature to outrun everything that tries to kill you. Mercenaries sent by your ex's dad, extra-dimensional beings, and superpowered organized criminals just can't keep up. However, Daniel Dos Santos is learning the hard way that not every problem can be left in the dust. When your own body starts attacking you, there's no avoiding it! Turns out there are unintended consequences when your body becomes capable of supersonic speeds. Will Daniel continue to push himself to his limits even if it means the end of life as he knows it? Or do even superheroes have to face their own mortality?