In the opening sequence, we are presented with a series of news clips and political speeches discussing the escalating tensions with North Korea, culminating in the movie's title on screen.
The scene shifts to Spokane, Washington, where we witness a high school football game featuring Matt Eckert (played by Josh Hutcherson). Unfortunately, Matt's team loses, primarily due to his overconfidence as he continues to attempt rushing plays instead of adhering to his coach's advice for better passes.
Following the game, Matt is picked up by his girlfriend Erica (played by Isabel Lucas), a spirited cheerleader, and they head off to a party. While enjoying themselves, the power unexpectedly goes out, but the teenagers remain oblivious to the impending danger, continuing their celebration into the darkness.
At the Eckert household, Tom (Brett Cullen) is unable to locate an extra mattress for his son Jed (played by Chris Hemsworth), who has just returned home. When Matt arrives, he asks his father if he caught the game, to which Tom proudly states his son’s team is fortunate to have him, regardless of the loss. As a police officer, Tom is soon called away to respond to the mysterious power outage, leaving Matt and Jed in the house, which they enter without acknowledging each other.
The next day, they awaken to ominous rumbling noises and rush outside to investigate. To their shock, they observe numerous large aircraft overhead and soldiers parachuting to the ground. As one plane is shot down and crashes into a house nearby, they quickly jump into their truck to find Tom, who fortunately meets them en route. He insists that they head for their mountain cabin to ensure their safety, while he stays behind to assist the townspeople. Though hesitant initially, the brothers willingly comply.
As the narrative unfolds, we see the brutal reality of the invasion by North Korean forces, signified by their military insignia. The Eckert brothers, filled with urgency, attempt to rescue Erica only to discover that they are too late. In a race against time, they pick up fellow schoolmates Robert (played by Josh Hutcherson) and Daryl (Connor Cruise), joining others in their escape.
Upon reaching the cabin, they quickly gather supplies, but tensions rise when Pete (Steve Lenz) recklessly shoots at an approaching vehicle, almost hitting Jed. In a showdown about firearms, Jed forces Pete to hand over the gun when he refuses to comply. The following morning, they find their provisions depleted after discovering that Pete abandoned them, leading them into the woods to regroup.
As despair sets in, they are discovered by Captain Cho (Will Yun Lee) and his soldiers, who use Tom and Daryl’s fathers as leverage. Following heartbreak and loss, the group rallies around Jed's passionate speech, igniting their determination to fight back against the aggressors with guerrilla warfare tactics as they become the Wolverines, taking pride in their school mascot.
Their first raid, utilizing strategic deception, proves successful as they engage the enemy and gain weapons and supplies. As their resistance grows, word spreads of their bravery, prompting others in Spokane to join their cause. During a public gathering where the remaining civilians are threatened, Matt observes Erica among the prisoners and prematurely initiates an attack to free her, risking the group’s safety.
Tensions heighten between the brothers amid the chaos; Jed confronts Matt about his reckless actions that jeopardized their mission. After heartfelt discussions, they reconcile, reaffirming their bond in the fight for their home.
Things take a significant turn when the Wolverines' hideout is bombed, leading to devastating casualties among their ranks. With the numbers dwindling, Matt, Jed, and a few survivors encounter American military personnel led by Tanner (Jeffrey Dean Morgan), who are also in search of the Wolverines.
Strategizing together, they realize that the briefcase constantly carried by Cho is vital to the North Korean operation. Their mission culminates in a daring assault on the enemy's stronghold, where they contend with fierce opposition. Betrayal from their own creates unexpected challenges, but the resolve within the group only strengthens.
In moments of triumph and loss, with brotherly admiration shared, Jed and Matt celebrate their victories, but fate deals a cruel blow as tragedy strikes. With dwindling numbers and imminent threats closing in, Daryl decides to sacrifice himself, ensuring his friends have a chance to escape.
Ultimately, as they prepare to board a helicopter, Tanner offers them an opportunity to escape to safety. However, the Wolverines choose to stand and continue the fight, making a valiant stand amidst the chaos of war.
The film concludes with Matt boldly rallying new fighters and leading a determined charge against their oppressors, showcasing their commitment to freedom and justice, symbolized by the American flag waving in the wind as they embark on their final battle.
