The film Aux, also known as The Call Up, is a 2018 British independent horror movie directed by John Adams and Toby Poser. It stars John Rhys-Davies, Tanya Franks, Rosie Fellner, and Tristam Summers.
The story of Aux revolves around two young boys, Jack and Finn, who stumble upon an abandoned military bunker while exploring the woods near their home. While inside the bunker, they accidentally release the restless spirit of a World War II auxiliary soldier, who is convinced that the Nazis have invaded England.
As the boys try to escape the bunker, they realize that the ghost is not just a figment of their imagination, but a dangerous and vengeful presence that has the power to summon other spirits of fallen soldiers. Meanwhile, a group of misfit soldiers who are on a training exercise in the same woods also stumble across the bunker, and soon find themselves trapped inside with the boys and the ghostly entity.
As tensions rise and the soldiers' survival instincts kick in, they must band together to face the supernatural threat and uncover the secrets of the bunker's dark past. The movie combines elements of historical fiction, supernatural horror, and military action to create a thrilling and suspenseful ride.