In 2049, Thawne warns Nora that they have to act fast to stop Cicada once and for all because a new timeline is trying to push its way into being -- and bring something really big, is coming with it. In the present, Nora and Barry confront a new metahuman, Acid Master, whose burn marks were on a newspaper article shown to Nora in the future, which leads her to deduce that the final confrontation with Cicada is upon them. Meanwhile, Joe and Cecile interrogate Dr. Ambres about working with Dwyer, when she reveals to them that Dwyer's niece Grace is a metahuman now. Barry reveals this to Dwyer, which makes him reconsider his whole vendetta, and successfully convinces him to take the metahuman cure by bringing up the possibility of curing Grace. Dwyer is taken to S.T.A.R. Labs and given the cure, but during the operation the facility is attacked by a new Cicada, who kills Dr. Ambres and abducts Dwyer. At a cabin in the woods, the new Cicada unmasks herself to reveal an adult Grace.