Cicada renews his murder spree against metas and cripples XS, causing Flash to lose control. Meanwhile, Killer Frost worries that she'll be destroyed by the cure Caitlin is working on, and Sherloque continues trying to unravel the mystery behind Nora's journal.

To find a device that will let them administer the meta cure to Cicada, Barry and Ralph go undercover to get it from a black market arms dealer. Meanwhile, Iris decides to go looking for Cicada on her own, and Sherloque meets a woman after his own heart.