After the events of Justice League II, Captain Cold was released from on the prison by his criminal crew - The Rogues. Meanwhile, working tirelessly day and night through both personas, Barry hopes to one day solve the murder of his mother that he witnessed personally, therefore clearing his father's name. While on the date with Iris, Iris's nephew, young Wally, gets a same lightning hit in chemicals in forestic lab, and as now young Wally also has the powers of Speedforce, Barry must teach the kid who to use them.
