Rewind

A white van carries a bomb with catastrophic potential, threatening nine million people and triggering a nationwide panic. Authorities suspect a Nobel Prize figure may be involved, heightening the sense of a global conspiracy. A police officer named Mr Knox guards a man who seems to possess critical clues, while a notebook filled with sketches hints at a larger, hazardous plan.

The man in custody appears reluctant to reveal the bomb's code, insisting he has no intention of helping. He is shown a wedding ring and questioned about Mrs Knox, hinting at personal motives behind the plot. A cheap notebook contains scientific sketches that hint at a deeper, troubling mechanism behind the threat.

Despite efforts to neutralize the threat, the bomb goes off, unleashing devastation and cascading consequences. Shaun Knox survives the blast but wakes up a month later in a altered, nightmare-haunted city. The immediate catastrophe sets off a mystery that drives the entire story.

Ellis, a security official, enters a high-security facility where Shaun is confined and pressured to explain the catastrophe. Shaun remains fixated on the scientist Benjaming Rourke and his wife, convinced their clues hold the key to salvation. A top-secret 48-hour furlong order is issued to authorize further investigation.

Danny and Shaun join Ellis at Sector 2 and begin assembling a time-window collider under Bryc's supervision. The device is unstable and not yet reliable, but they believe it can reveal past events that must be influenced. The mission is framed around meeting Dr. Rourke to unlock a way to avert the disaster.

The window trembles as the device is tested, revealing unstable glimpses of the past. They observe England in 1934 and Washington in 1929, confirming they can reach historical moments. The team begins to understand that altering these moments could shape a future where New York is saved.

The military, led by General Webb, debates civilian involvement and the broader ethics of changing history. Shaun argues that saving Rourke's wife could protect New York, while others warn of unpredictable ripple effects. A plan forms to intervene in key moments without destroying the overall timeline.

The mission detours to 1975, where Sylvia is killed in a mugging and Ronald Marsden is involved in a bank-style robbery. The team weighs whether halting Marsden’s arc could prevent future catastrophe, acknowledging the immense risks of altering history. The stakes rise as timelines threaten to destabilize.

Priya prepares historical data while Lyndsay, Danny, and Shaun discuss the personal costs of time travel. They each accept the possibility that they may not return, and they ingest green pills that enable temporal movement. Farewells are exchanged as the team steels itself for the leap.

Shaun, Danny, and Bryc enter the time window, their forms blurring and their senses reeling as the corridor of time twists around them. Danny feels the worst effects, while Shaun persists with resolve, hoping their journey can avert the catastrophe facing New York. The jump marks the start of a perilous mission across eras.

In the past, the trio faces pursuit and a chaotic escape, including a car theft and a bootlegger shootout. They survive a deadly encounter and Marsden’s sister Jenny becomes a new, unintended consequence of their actions. Time becomes fragile as their weight and momentum push the window toward instability.

They race back to the hotel basement and press the return button, hoping to restore the present. Back in the present, lights go out, the city seems saved, and Shaun reconnects with Jess, while Bryc warns of dangerous future uses of the machine. Suddenly, Jess disappears and the world begins to change, signaling a destabilized timeline.