Little Monsters (2019)

Set in Australia, Dave is a dirty-talking, washed-up musician who goes through a rough break up with his girlfriend Sara and is forced to stay with his sister, Tess, and her son, Felix, a child with a fascination for tractors, space blasters, and Darth Vader. While dropping Felix off at school, Dave meets Miss Audrey Caroline, Felix's kindergarten teacher, and is attracted to her. After a parent drops out from an upcoming field trip to a farm, Dave volunteers to chaperone, to be near Audrey.

On the day of the field trip, Dave is upset to learn that beloved children's television personality Teddy McGiggle is filming his show there and that Audrey is engaged to someone else. Meanwhile, zombies break out of a U.S. testing facility and head straight for the neighboring farm where they attack the class, who try to escape, only to realize the farm is overrun.

The survivors try to seek shelter in the gift shop, only to find that Teddy has locked himself inside and refuses to let them in. Audrey and the children crawl into an opening next to the shop. Dave breaks in from the roof, beats up Teddy, and unlocks the door so Audrey and the children can come in. Felix then has an allergic reaction after Dave accidentally feeds him chips with dairy in them. After a botched attempt to give Felix epinephrine, Audrey rushes to get some from Felix's backpack, which was left in the tractor. Teddy tries to signal a military helicopter, but falls off the roof and is rescued by Dave, to whom Teddy reveals that his real name is Nathan Schneider and that he is an alcoholic sex addict who hates children and sleeps with their mothers to escape his depression.

That night, while Teddy and the children are asleep, Dave tells Audrey about how his father left him when he was young and that only his sister was there for him. Audrey reveals that she is no longer engaged, as her fiancé had cheated on her with a co-worker (only wearing the ring to keep her pupils' fathers away), and that she got into teaching after following Hanson on tour.

The next day, the children wake up and begin complaining, so David sings Neil Diamond's "Sweet Caroline", getting the children involved when he changes the chorus to Miss Caroline. Meanwhile, the military plans to bomb the gift shop the children are in to destroy the zombies and prevent an outbreak. The survivors decide to get a large vehicle and drive to safety. Teddy and Dave attempt to get Teddy's McGiggle Mobile, but Teddy betrays Dave, and is then killed by the zombified crew member who plays his sidekick Frogsie. Dave is forced to climb on top of the van to avoid being eaten, where he is able to get phone reception and thank Tess for supporting him. When all seems lost, Felix arrives driving a tractor and saves Dave, and together they rescue Audrey and the children. As they drive to safety, they discover that the zombies respond to the music Audrey plays. They eventually reach the military and escape just as the farm is bombed. The zombies following them are gunned down by the army.

Dave and Audrey share a kiss before they and the kids are taken away and placed in quarantine for 48 hours in case of infection. The final scene shows Dave, Audrey, and the kids singing Taylor Swift's "Shake It Off", which Dave previously hated, as the kids' parents watch on with tears of joy in their eyes.