A young, socially-awkward janitor in an elderly care home sets out to go on an adventure with his three elderly best friends.

The film, directed by John McPhail (Anna and the Apocalypse), tells the story of Dinah Little, a no- nonsense, curmudgeonly farmer, and Charlie, the unloved niece who Dinah begrudgingly takes in after discovering her in an orphanage. Dinah's farm is in the self-proclaimed "Pumpkin Capital of the World" where the biggest event of the year is a high-stakes, cutthroat giant-pumpkin-growing contest with an enormous cash prize. Charlie, who has a special bond with plants, decides to enter the competition where she and the other pumpkin growers face sabotage and a genetically engineered rival. As she nurtures her pumpkin ‘Peter’ and watches him grow, so does a bond between Dinah and Charlie.

Shortly after comic artist Adam responds to Internet trolls, he begins experiencing sleep paralysis. As he chronicles increasingly malevolent occurrences in a series of tweets, Adam begins to believe he is being haunted by the ghost of a dead child named David.

A zombie apocalypse threatens the sleepy town of Little Haven – at Christmas – forcing Anna and her friends to fight, slash and sing their way to survival, facing the undead in a desperate race to reach their loved ones. But they soon discover that no one is safe in this new world, and with civilization falling apart around them, the only people they can truly rely on are each other.