Set after the events of Impossible Hope. Barry Allen and Iris West move into a tricky future involving masks and secrets. Meanwhile, a new metahuman emerges in Central City.

Set after The Flash and Arrow mid-season finales. (1x9 and 3x9) Barry receives the news of Oliver's death. In his grief there is only one person he feels he can talk to - Iris West. Meanwhile Iris struggles with the issues of trust and hope while she navigates a complicated and difficult future.