Plot

A father and his twin teenage sons fight to survive in a remote farmhouse at the end of the world.

In a near future, life on Earth has been decimated. Paul and his twin teenage sons, Thomas and Joseph, have been living a half-life tranquility by day and torment by night. When the sun sets, ferocious creatures of the night awaken and consume all living souls in their path. One day, when Thomas doesn't return home before sundown, Paul chooses to leave the safety of their fortified farm to find him before the creatures arrive. Just as he finds his boy, a nightmarish battle ensues and Paul is gravely wounded. Now the twins must devise a desperate plan for surviving the coming night and use everything their father has taught them to keep him alive.—Highland Film Group

Paul is scavenging for supplies in a storehouse and then fleeing through deserted back alleys, with the pandemonium of an apocalyptic event in the background, sirens blaring, sounds of distant explosions, and people screaming. He seeks refuge in a secluded spot, cradling his two infant boys and reassuring them that everything will be okay.

Fifteen years later, after a pandemic has wiped out most of the population and caused civilization to break down, Paul and his twin sons, Joseph and Thomas, live in a derelict farmhouse, eking out what livelihood they can during the day and sheltering from monstrous photophobic creatures at night. As Thomas returns home one evening after sunset from a nearby farm belonging to the Rose family, it becomes apparent that he is the bigger risk-taker of the two brothers, while Joseph appears more intellectual and talks about ways of improving their situation beyond mere survival. After dinner, they hear loud banging coming from the cellar, which stops after three attempts by the creatures to enter the house.

The next morning, Paul finds deep gouges on the outside of the cellar door and decides to reinforce it. Joseph reveals that he has been working to restore an off-road utility buggy in the barn, and Paul shows him how to start the engine. After Paul teaches Joseph how to drive it, he sends both his sons to salvage some wood for reinforcing the cellar door. Thomas, who is secretly in love with Charlotte Rose, wants to go to the Rose farm and leaves his brother, telling Joseph to pick him up before sunset so they can return home together.

On his way back from the Rose farm, Thomas trips and falls into a cave, concussed and unconscious. After Joseph returns home without his brother and with night falling, Paul sets out to find Thomas and discovers him in the cave, where they decide to stay until sunrise. When several creatures converge on them through the rocks underneath the cave later in the night, Paul lights a flare, but one of his hands gets trapped in the rocks, and as the charge detonates in his hand, it kills the creatures and causes the cave to collapse.

Meanwhile, home alone, Joseph uses himself as bait and traps one of the creatures, intending to study it later. Driving the buggy in the morning, he finds Thomas and Paul, who is badly injured and unconscious, and brings them home. Thomas insists that they should take their father to the Rose farm, as better care can be provided there, and because Paul won't survive without medication. They arrive at the farm, and Mr. Rose and his wife announce they cannot spare any medicine to help him, though they are willing to let Thomas stay. Joseph and Thomas get into a fight, and Joseph returns home with Paul, while Thomas stays at the farm.

Thomas is caught by Charlotte looking for medicine to bring to his father. He convinces her to show him where it is kept and promises to return, but as he attempts to sneak back home, he is stopped at the gate and held at gunpoint by a farmhand who takes him for a looter. He and the other farmhands restrain Thomas and threaten to punish him for his thievery.

Back home, Joseph finds a large hole forming under the floorboards and realizes that the creatures have been digging under the house, intending to get inside. At the Rose farm, they attack through a similar hole dug under the floor and kill everyone except Thomas and Charlotte, who escape to Paul's farm. There, Paul regains consciousness and suggests a course of action to fight the creatures. Joseph starts preparing a trap, planning to set off several gallons of fuel as an improvised fire bomb. In order to give the brothers and Charlotte more time to make it to safety, Paul locks the door behind them and holds the creatures off until the bomb explodes, sacrificing his life.

The next day, Charlotte buries her parents. She joins Joseph and Thomas, and the trio set off to check for possible survivors on the other farms in the area. (thanks to Wikipedia)