In the heart of a city, the inhabitants of a tower wake up one morning to find that their building is shrouded in an opaque fog, obstructing doors and windows - a strange dark matter that devours anything that tries to pass through it. Trapped, the residents try to organize themselves, but to ensure their survival they gradually succumb to their most primitive instincts, until they sink into horror...

Young drug dealer Pablo and his sister Appoline bond over an online game called Darknoon. Pablo falls for Night, neglecting his sister. While Appoline finishes the game, Pablo and Night become embroiled in a dangerous gang conflict.