Strong willed and organised Robyn wakes up unexpectedly on a strange beach. Panicked and with strange supernatural events happening around her she runs to a small cabin not far away. There she finds Seb is enjoying himself in a threesome with outgoing Patricia and the youngest, kind-hearted, Livvy. Uncertain of where she is she speaks to the three and finds out that they are in some sort of afterlife following the collapse of a roof in an overcrowded nightclub. Suddenly quiet and shy Onie appears out of no-where, suggesting she may be teetering between life and death. Clues are provided by the cabin itself, the different rooms, and two paintings inside the cabin. Whilst the five get to know each other tensions flare as they try and work out why they are all there. A nearby lighthouse causes them all to have terrifying flashbacks accompanied by deafening sounds. Any attempt to walk away from the cabin towards the lighthouse is met by them somehow ending back up at the hut. Despite Onie trying to self-harm, and the girls trying to kill Seb, it appears they can no longer 'die' again as they are already dead. A supernatural being of unknown power, manifesting as black smoke, takes over the bodies of Seb and Robyn at various points. As time passes the 'bubble' they are trapped in slowly grows smaller around the cabin, which contains different rooms from each of the occupants lives. It is determined that the house is a single occurrence of a cosmic test which everyone must undergo upon death, with the solution being not to sin again having reached the tabula rasa house. It is also determined that no one has ever passed the test, that everyone outside the bubble is in Hell, and that Heaven is empty because of this. Onie reappears and disappears for one last time having decided to live, leaving a blanket to control the smoke monster. Livvy uses the blanket to make Robyn possessed, revealing that she figured out Robyn's sin and convincing her to use the demon power to take Livvy to Heaven. Upon destruction of the afterlife, Hell would theoretically also be destroyed, freeing every soul who ever died from it. At the end the bubble closes on itself and the film ends abruptly, with the result of Livvy's plan left ambiguous.
