AllMovie

Barry goes after Ronnie when he realizes Caitlin's fiancé is a dangerous meta-human who attacked a physicist. To track him, Barry visits Dr. Martin Stein who is working on a project called F.I.R.E.S.T.O.R.M. Meanwhile, Barry struggles to balance his duties as the Flash with the relationship he has with Linda Park; and Joe enlists Cisco's help to reinvestigate the murder of Nora Allen.