Stung (2015)

Julia, who runs a catering company, and her employee Paul (Matt O'Leary), prepare to set up for a function at the Perch estate. The rural world of Mrs. Perch, a well-to-do elderly lady in New York, anticipate of her annual garden party, a small but elaborate affair held in a villa at the remote estate where she resides with her son Sydney. Among the guests is the town mayor, Caruthers.

Due to an illegally imported plant fertilizer mixed with growth hormones which seeped into the ground, a local species of parasitic wasp mutated into significantly larger creatures. Mrs. Perch's upper-class celebrants, slowed by the evening's festivities, were attacked by the wasps. After burrowing inside their victim's bodies, the wasps emerge as creatures seven feet (2.1 m) long.

Paul and Julia realize that the wasps reproduce through their stingers, also ovipositors, as juvenile wasps emerge from human hosts who are killed in the process.

Paul, Julia, Mayor Caruthers, Sydney, Mrs. Perch, and Flora (the cook) take refuge inside the house, barricading it from the fierce attack. Following a car crash outside, the phone lines are dead, leaving the survivors cut off from the outside world. They hide in the basement, but Mrs. Perch, who has already been stung, is killed when a wasp bursts from her body. They flee into the hallway and close the door, but the wasp's stinger penetrates the door, killing Flora.

Paul, Julia, Mayor Caruthers, and Sydney escape to the wine cellar. They consider escaping in the catering van, but Paul has left his keys outside. He manages to retrieve the keys and kill a wasp. Sydney, however, has been stung, and is controlled by the emergent wasp until Paul and Julia subdue him.

Paul, Julia, and Mayor Caruthers begin to sneak around and find an exit. The three suddenly under attack, Mayor Caruthers sacrifices himself, allowing Paul and Julia to escape into another room. They kill an invading wasp and get outside, but Paul is taken by a wasp and flown to a nest. There he recognizes the queen emerging from Mrs. Perch still controls Sydney, who attempts to force a wasp larva into Paul's mouth to incubate and grow. Julia appears and cuts Sydney in half with an electric saw, rescues Paul, and blows up the nest. As they drive away, a surviving wasp, its body on fire, attacks the car. Paul rams the car into a tree and kills the wasp, but the crash knocks him and Julia out.

Paul wakes up and tries to wake Julia. Finally, she wakes up to the arrival of the authorities. They are placed in the back of an ambulance where they kiss and start to have sex. An officer wanting to question them closed the ambulance doors to allow them privacy. An officer approaches the front of the van where the queen wasp is pinned against the tree and just as he asks another officer "What do you think of this?", a cow's head falls from the sky crushing him to death. The officers and paramedics look up into the sky, the ambulance doors open allowing Julia and Paul to see wasp-cow hybrids flying overhead with a cow bell ringing. The camera cuts to black leaving the fate of humanity unknown.