In California, during the winter of 2020, a deadly mist reappears every century, turning people into zombie-like creatures. Darius Ormonde, a chemistry student, knows the legend but isn’t fully prepared when the mist arrives early.

While celebrating his acceptance into Sitford, Darius is with his friend at a skyscraper restaurant. Asher César, a wealthy is on a blind date arranged by his parents. As the mist descends, Darius urgently disassembles a coffee machine to create a filter, accidentally grabbing Asher’s hand instead of his friend’s as they rush to safety.

In the chaos, Darius discovers he's rescued a stranger. Now they have to rely on each other, Darius and Asher battle the creatures of the mist as they search for its source. With time running out, they have to wait it out until the mist clears and the world is cleansed.