Justice League: The Flashpoint Paradox

Barry visits his mother's grave and is alerted to a break-in at the Flash Museum by a cadre of Rogues. He engages Captain Cold, Captain Boomerang, Heat Wave, Mirror Master, and The Top, holding them off with speed. He learns they were hired by Professor Zoom to lure him into a trap that could threaten Central City.

After the fight, Barry learns Zoom planned the break-in to draw him into a larger scheme against Central City. The revelation shows the danger isn't just the Rogues but the mastermind manipulating time itself. Barry resolves to seek help from the Justice League to stop Zoom.

With support from the Justice League, Barry helps derail Zoom's immediate plan and prevents the catastrophic outcome he intended for Central City. The victory hints at the bigger consequences of meddling with time and memory. Barry vows to uncover Zoom's full plan and protect his city.

The next day, Barry wakes to a world where his powers have vanished, his mother is alive, and the Justice League no longer exists. Atlantean forces and Amazons wage war across Western Europe after Mera's death, while a Cyborg-led government task force tries to end the conflict. Barry realizes reality itself has fractured.

Barry travels to Wayne Manor to find answers and discovers Bruce Wayne is dead in this timeline; Batman is now Thomas Wayne. He retrieves his Flash suit from a ring, only to find Zoom's costume waiting in its place, confirming that someone rearranged history. Barry steels himself for the fight to restore things.

Thomas Wayne agrees to help Barry recreate the accident that gave him powers, hoping to restore the original timeline. The attempt goes wrong and leaves Barry severely burned, underscoring the risks of time meddling. Barry's conviction hardens as he realizes Zoom's manipulation runs deeper than he imagined.

In London, Steve Trevor is killed while trying to evacuate Lois Lane, who is then hunted by Amazons. She escapes with the aid of a local resistance and becomes entangled with their struggle against the Atlantean-Amazon war. The altered world shows how fragile history has become.

Amid the remains of Paris, Deathstroke and Lex Luthor are slain by Aquaman's forces while pursuing a new weapon: a captured Captain Atom. The pursuit raises the stakes for the resistance and for Barry's mission to correct the timeline. The war's momentum presses forward as new threats emerge.

Realizing his memories are fading, Barry pushes Batman to attempt the accident again, and this time his powers return. He resolves to gather allies and stop Zoom once and for all. The restored power re-ignites his hope but heightens the risks of altering time again.

Barry and Batman work with Cyborg to free Superman, who is imprisoned after his Metropolis crash. Powered by the sun, Superman holds off government agents, but ultimately flies off in fear and confusion, leaving Barry to face the timeline's instability. Barry's world remains unstable as memories continue to shift.

On Batman's jet en route to Britain, Lois's photo hints that Zoom is near. The Atlantean fleet attacks, and Batman and Barry battle Aquaman while Captain Thunder and Billy Batson join to fight Wonder Woman. Zoom's secret identity emerges as Barry realizes he may be the architect of the broken timeline.

In the climax, Zoom is killed by an injured Batman, who reveals that Barry's own actions created the fracture. The only way to fix things is for Barry to travel back to the moment he first prevented his mother's death. Barry succeeds in resetting the timeline and wakes back at his desk, promising Batman that he is a true messenger.

Barry returns to a restored, normal timeline and visits Batman to share the truth, delivering the letter from his father. Batman's tearful line, You're one helluva messenger, underscores the cost and purpose of Barry's journey. The story closes with a cautious, hopeful note about the future.

In a mid-credits scene, a Boom Tube opens above Earth and Parademons spill into space, foreshadowing Justice League: War. The tease hints at a looming threat beyond Barry's restored timeline. It leaves audiences anticipating a new chapter in the cinematic universe.