Based on the Creepypasta and r/NoSleep short story written by Mallory Eddy. One weekend while their parents are away, three sisters decide to build a box fort. As strange things start to happen around them, they wonder if someone or something is living inside of it.
Theo is okay! Early into the short he goes missing and later on we hear a dog whimpering inside the box fort. By the end Theo is found safe and sound and unharmed.
a lot of the film takes place in a box fort, and it shows people crawling through the tight spaces of it frequently, and their breathing is a little loud