While Allegra manages the crisis at the office, investigates a mysterious new speedster who saved IVO Labs from a fire. Fearing a new threat, Barry visits an imprisoned Eobard Thawne at Lian Yu for insight. Thawne suggests this new runner is an amateur, still terrified of their own power.
Kordell agrees to let Cisco build him a dampening collar so he can control his abilities. He sits with a new saxophone, playing a soft, melodic tune. the flash season 8 episode 17
The episode ends with a cliffhanger as the speedster's universe is shown to be on the verge of collapse, and Barry and the team realize they may have to deal with the consequences of their actions. While Allegra manages the crisis at the office,
“You think you’re the hero? You’re just the amplifier. And the Flash? He’s about to hear his own death rattle.” Kordell agrees to let Cisco build him a
In a dark lab, Echo’s broken device is collected by a gloved hand. A voice (possibly Red Death’s or a new big bad) whispers: “Frequencies can be rebuilt. So can speedsters. Phase two begins.”