When a severely injured Cisco suddenly appeared in the middle of the night with a warning that Jay Garrick is in terrible danger, Team Flash gears up. Traveling to Earth 3, they must hurry to free their speedster friend before the new threat manages to reach his goal; harnessing Garrick's speed. If they were to fail and let their new enemy gain power over his own past and destiny, consequences for Earth 3 could be disastrous. Take place after Devoe's defeat, but before Nora appeared.

AU 5x03 Death of Vibe: it's over, Cicada killed Cisco and injured Barry, leaving him powerless and devastated. But, when the speedster starts getting visions and hearing his deceased friend, Barry is left wondering if he's losing his mind or if he's really being haunted by Vibe. To make things worse, a mysterious shadow starts attacking Team Flash for unknown reasons.