In a comedy-drama with tragic undertones, Sodium Day tells the story of a neglected Matric class in a dilapidated public school on the Cape Flats. In the space of a single day, we witness how they navigate their way through absent teachers, racial tensions, a fellow student gone missing, and the threat of local gangsters.

As the class of a nearby private school arrives for a cultural exchange program, the ensuing mischief only briefly provides a veil for the latent tensions, before it all combusts as the students are pushed to their limits - a day they will forever remember as Sodium Day.