The Abel family—comprising Francis (Sid Lucero), his wife Iris (Beauty Gonzalez), and their sons Joshua and Lucas—find themselves fleeing from a terrifying zombie outbreak engulfing their city. Their journey brings them to a mansion owned by Francis' parents on an expansive sugarcane plantation. Upon their arrival, Francis is met with a horrific discovery: his father and a housekeeper have taken their own lives after succumbing to infection, while his mother now roams as a reanimated zombie. In a desperate act, Francis slays her and he and his family make their home in the mansion, but not without scars from the past. It is revealed that Francis carries deep trauma from his childhood, a result of being locked in the basement by his father. Compounding his struggles, his marriage with Iris is fracturing due to her infidelity, with the shocking twist that his elder brother Diego (Enchong Dee) is actually Joshua's biological father.
As days pass, Iris persuades Francis to search for a new safe haven, but their plans collapse when they must abandon their van at a zombie-infested checkpoint. In an attempt to retrieve their vehicle, Francis instead secures fuel for the mansion's generator, while Joshua learns about a potential safe zone from the radio and urges Francis to investigate. Instead of taking his son seriously, Francis dismisses him, opting to teach Joshua how to fire a gun. This reckless training inadvertently attracts a horde of zombies that besiege the family until the timely intervention of Diego, who diverts the zombies away using his vehicle. The following day, Francis and Diego attempt to mend their fraught relationship; however, Francis, harboring animosity over Diego’s favored status and affair with Iris, rejects Diego’s guidance towards safety, threatening him at gunpoint. In a lingering move, Diego leaves behind a map indicating the location of the safe zone, should Francis choose to reconsider.
After overhearing Iris suggest that the zombie threat may be weakening, Francis spirals into paranoia. He stages a false zombie attack, barricades the mansion, and locks his family inside. During dinner, Joshua confronts Francis with Diego’s map, which leads to a heated admission from Iris that she wishes to leave him. In a fit of rage, Francis burns the map right in front of her. Later, a wounded soldier finds refuge in the mansion, confirming the diminishing zombie presence and revealing he was led there by Diego, who has met a grisly fate.
The following day, suffocating under the weight of Francis's authoritarian actions, Joshua leaves the mansion. Francis, upon discovering his son’s disappearance, descends into madness, murderously attacking the soldier with a hammer and imprisoning Iris and Lucas in the basement. Meanwhile, Lucas pretends to be ill to lure Francis’s attention. In an explosive moment of defiance, Iris stabs her husband and locks him away, facilitating their escape with Lucas. Yet, memories of his traumatic past immobilize Francis as he attempts to pursue them. Suddenly, they are confronted by a reanimated Diego, who fatally infects Lucas. Hearing his family's cries for help, Francis reclaims his sanity, escaping his confinement to confront Diego, whom he kills in a brutal confrontation. However, the victory is bittersweet as he witnesses the horrifying aftermath of Lucas’s bite, while Iris must take drastic measures to save their son by amputating his limb.
In a final bid for survival, Francis returns to the checkpoint to recover their van but tragically meets his end when Joshua, in a moment of panic, shoots him, mistaking him for a zombie due to his blood-soaked and disheveled state. As Joshua realizes his fatal mistake and seeks forgiveness, Francis, with his last breath, acknowledges him as his son, leaving Joshua with the harrowing task of driving the van to rescue Iris and Lucas.
