Castells is a film that looks into the art of human towers in Catalonia. It explores the characters and the communities that are part of this beautiful and mesmerising tradition.

Castells are seemingly a simple activity; people climb on top of each other to create the highest tower. However, under the surface they are a metaphor to how communities interact, everyone playing a role, sacrificing oneself for a greater common objective. They illustrate how being part of society is about participation and interaction.