The cinematic story unfolds with visceral intensity as chaos and destruction engulf the world. In the thick of this turmoil, Dan Forester, along with a diverse group of soldiers, finds himself hurtling toward Miami Beach, their fates ominously tied to the ravaged city.
We fast-forward to December 2022, where an idyllic scene belies the chaos outside. Dan, a devoted biology teacher, lives happily with his caring wife Emmy and their clever daughter Muri. However, this moment of peace is fleeting, overshadowed by Dan's anticipation of news regarding a promising job at a research institute. His spirits momentarily lift during a Christmas celebration, but the festive joy is abruptly interrupted when a catastrophic phenomenon occurs - a vortex erupts in a nearby arena, releasing battle-hardened soldiers from a future riddled with despair.
Among these soldiers is Lieutenant Hart, who brings a chilling revelation: humanity faces destruction in 30 years due to an impending alien invasion. The military’s mission is to recruit volunteers willing to travel through time and avert this impending doom. As the gravity of the situation sinks in, hope begins to evaporate amidst protests and unrest over the draft.
Fast forward a year, and the world is steeped in hopelessness. Dan’s students, burdened with the knowledge of their potential extinction, find it increasingly difficult to concentrate on their lessons. The classroom, once a sanctuary of learning, transforms into a stark reminder of the grim reality ahead.
As the situation deteriorates, Dan receives his draft notice, marking the beginning of his transformation from an everyday teacher to a time-traveling warrior. After rigorous assessments, Dan learns that his unique background qualifies him for the mission. With a special device attached to his arm, he gains the necessary means to navigate through time, unveiling hidden aspects of his past, including a formative year in Iraq as a squad leader. The stakes rise as he grapples with his existence and humanity’s precarious future.
Time becomes an adversary as Dan faces the urgent decision to set his affairs in order within 24 hours. He consults Emmy, whose profession as a therapist places her in contact with veterans struggling with the draft’s consequences. Emmy’s insightful guidance reveals that there exists one person capable of ensuring his family's safety - his estranged father James, whose absence has deeply affected Dan. Despite feeling anger and resentment, Dan is compelled to reach out, hoping that his father will aid him during this harrowing period.
The reunion with James is tumultuous, forcing Dan to confront his father's choice to live off the grid. In a moment of harsh honesty, James reveals his disinterest in being part of Dan’s life, igniting frustration and betrayal within his son. Yet, as Dan reflects on this painful encounter, he comes to recognize the truth in his father's words; engaging in their troubled relationship could have only led to greater suffering.
Returning home, the weight of reality strikes Dan as he shares the news of his draft status with Emmy and Muri. Their devastation is palpable as they grapple with the possibility of losing him. As they embrace during this heartbreaking moment, Dan gears up for an uncertain journey ahead.
At the draft, he meets an array of fellow soldiers, including Charlie and Dorian, who, like Dan, are unprepared for the horrors that await them. As they receive their training, the abhorrence of time-jumping is introduced. Dan’s curiosity is piqued when Charlie explains that they’re sending recruits who have already died to circumvent persistent paradoxes. The weight of this information deepens as Dan learns more about Dorian’s experience with an alien called a Whitespike.
Suddenly, the unprepared draftees are launched through time into the future, crashing onto Miami Beach amidst chaos and calamity. Survivors narrowly escape dire fates as they regroup under the orders of the enigmatic Colonel, who instructs them to salvage the remaining lab personnel before a military bombardment wipes out all life in the area. As they explore the ruins, the team discovers grim evidence of a slaughtered research team but manages to recover vital data. Their relief turns to panic as they find themselves face to face with the vicious Whitespikes, whose lethal speed challenges their survival instincts. In a heart-stopping moment, Dan heroically attempts to rescue Cowan, who succumbs to the chaos as the military unleashes mayhem upon the site.
Reeling from this loss, the few remaining draftees awaken in a remote Dominican camp where Dan meets a much older Colonel Muri. Her chilling demeanor reveals unresolved conflict over the decisions Dan made during the draft. She shares that they’ve been tracking down a female Whitespike, crucial for finding a way to eliminate the alien menace. Their mission intensifies as they venture into a cave filled with dangers from both above and below.
With the fate of humanity hanging in the balance, Dan and his team capture the vital female Whitespike, only to face further trials. Muri reveals that Dan did not survive long after his draft and instead witnessed the tragic end of his life. Armed with this knowledge and the toxin created from the Whitespike’s biology, they return to the oil rig with hopes of fashioning a weapon against the alien threat. However, chaos reigns once more as the vessel is overrun by extraterrestrial forces, and disaster strikes when Muri makes the ultimate sacrifice to protect the mission.
Back in the present, tormented by his experiences, Dan longs to save Muri but is hampered by the Jumplink's malfunction. He is drawn back to his family where he confides in Emmy about his relentless pursuit to unravel the mysteries surrounding their fate. Together, they delve into theories proposing the Whitespikes might not be intruders of the future, but rather ancient adversaries awakened by climate change.
Dan’s quest leads him to investigate further, but he faces resistance from authorities. Determined to take action, he turns to James for help, and they infiltrate a frozen landscape in Russia, comes frighteningly close to comprehending the Whitespikes’ true origin. In a dramatic turn of events, a battle erupts as Dan’s team attempts to administer the toxin, only to be thwarted by the awakening of the alien vessel. Amidst the turmoil, sacrifices are made, and the truth about the Whitespikes’ insidious nature is laid bare.
With a final act of courage, alongside a riveting battle, Dan prevails, delivering the lethal toxin in a climactic moment that seals the fate of the alien threat once and for all. As their heroic deeds unfold, the initial government official’s skepticism turns to acclaim, uniting Dan with Emmy and Muri, finally in the embrace of family despite the chaos that has forever altered their lives.
