When Barry suddenly gains the power of speed thinking, he attempts to use his new gift to save Iris. While Barry is thrilled with his new power, Cisco is hesitant to trust it. Meanwhile, Eva must face a shattering truth.

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.