Нора е тежко ранена при сблъсък с Цикада, заради чиито притъпяващи сили бързото ѝ изцеляване е спряло да действа, а Бари и Айрис са уплашени за бъдещето на дъщеря си, което кара разгневения Бари да предизвика Цикада в ожесточена схватка.

Barry's efforts to prepare Cisco for Crisis are derailed when Cisco schemes to save Barry's life instead. Meanwhile, Ramsey Rosso uses his deadly new abilities to save his own life, while sacrificing his humanity in the process.

John Diggle arrives in Central City with a weapon to help Barry stop the Godspeed War. Meanwhile, Allegra and Ultraviolet's new bond is put to the ultimate test, while Joe and Kristen Kramer are hunted by a former colleague of hers.

The Flash enlists a host of speedster allies, including Iris and his children from the future - Bart and Nora West-Allen - to end the speedster war and defeat a deadly new adversary: the villainous Godspeed.

With a new speedster in town, The Flash gets much more than he bargained for, meanwhile Cecile's powers experience a growth spurt allowing her to aid Team Flash on an entirely different level.

With The Flash still reeling from everything that just happened, the rest of the team rallies to support him when he needs it the most.