Team Flash works on their Savitar trap, but in the meantime, what if we experimented on Barry’s brain in order to slow down Savitar? What could go wrong? And so amnesia hijinks ensue! With Barry having no memory and Wally’s powers reset, the city has no Flash, which is a problem when discount Heat Wave goes on a rampage. Killer Frost offers to help out Team Flash at the price of Barry’s innocence....