Barry Allen and his CCPD partner Donald Drake investigate a disturbance, only to be ambushed by a new speedster calling himself Zoom. Zoom traps them on Earth-2, a twisted alternate reality. There, they meet Earth-3’s Flash, Jay Garrick, who’s also trapped. Zoom forces them through a brutal labyrinth to delay them while he pursues a dark mission. After surviving Zoom’s traps, Barry, Donald, and Jay must face Gorilla Grodd guarding the way to Earth-2’s STAR Labs. In a desperate battle, they defeat Grodd, and Barry uses the Cosmic Treadmill to open a rift home. As the rift opens, Zoom attacks. Barry is pushed through, but Donald stays behind to buy him time. Zoom chases Barry to the edge of reality, where he reveals the truth: he was once Hunter Zolomon, the Flash of Earth-2. After losing everything to an unknown red bolt of lightning and surviving the Dark Speed Force and the Black Flash, Zolomon became obsessed. His only hope was to collect the speed of Flashes across the multiverse to stop the Red Bolt. Barry realizes the Red Bolt matches the one that killed his mother. Just then, the Red Bolt arrives, striking down Zolomon. Barry runs faster than ever to escape and return home. In the credits scene, Barry meets Dr. Ryan Choi at STAR Labs, asking if he can help him explore the multiverse. Later, Barry visits Iris West’s home, where he’s introduced to her nephew, Wally West.
