The Flash must deal with Abra Kadabra's sudden return to Central City; Allegra deals with a tricky situation; Caitlin suspects something is off with Frost; Iris is forced to look at a dark moment in her past.

Cisco and Chester travel back in time and get stuck in 1998, repeating the same day over and over again. The key to returning home is at Chester's childhood home but he refuses to visit. Meanwhile, Iris forges a connection with the speed force.