As Barry works on improving his speed through various training exercises, Leonard Snart returns to Central City with the freeze gun and a new partner, Mick Rory, to set a trap for the Flash. Barry discovers his plan, and agrees with Dr. Wells to not engage Snart in the hope that he goes away and no one gets hurt like the last time. When the Flash fails to show, Snart and Rory, who now has a gun that can emit absolute hot temperatures, kidnap Caitlin to force Barry out of hiding. Cisco and Barry realize that if they can get Snark and Rory to cross the streams of their respective weapons it will cancel out the effects. The Flash meets Snark and Rory in the middle of a city for a showdown. After multiple failed attempts, Barry eventually gets them to cross the streams, successfully damaging the weapons and disabling the criminal pair. While in transport to Iron Heights Prison, Snart and Rory are broken out by Snart’s sister. Meanwhile, Caitlin investigates what happened to Ronnie to cause his transformation.