Savitar lived for several decades, fighting speedsters such as Max Mercury, the Golden Age Johnny Quick and the Wally West Flash. He was more of a threat to the entire Flash Family than the Hunter ...

Barry travels to the future to find out Savitar's still-unknown identity in the hopes of saving Iris. Upon his arrival, he meets future versions of his Team Flash friends.

Barry and the team meet scientist Tracy Brand, who may be the key to stopping Savitar. Unfortunately, Killer Frost is also after Tracy, so Team Flash must battle their old friend.