When Joe West is sent on a missing person report to an insane asylum he's not sure what to expect, but he's certainly not expecting to have to solve the case of where a girl came from. No leads and no clues except for the walls of her cell: one is covered with equations, one is covered is names, one with drawings and one with only two words completely covering it: Wally West. Team Flash is sent out on a mystery to find where Artemis Crock came from, and what she's looking for.