After the death of Iris West, a teenager saying he's related to Barry needs to come with him to the future. He does so and finds Iris alive and well, stating that her spirit traveled back where she was originally from with a body her original parents made her. With this, Barry decides to settle down in the future and raise a family. But, not all is well and a man named Cicada and his loyal followers are killing innocents and it's only up to Flash and Impulse to stop them.
