Drivers along Montevideo's Rambla slow down at the same point every time. The Pittamiglio Castle interrupts a row of ordinary apartment blocks with turrets, mismatched windows and salvaged fragments assembled into a facade that obeys no recognisable style. It was built by Humberto Pittamiglio, an architect and dedicated student of alchemy, who worked on it continuously and treated the house as a construction to be read rather than simply inhabited. Inside, the plan defies domestic logic: staircases that turn back on themselves, doors of unexpected proportions, corridors that lead nowhere obvious, and a persistent vocabulary of symbols that guides interpret in the light of his esoteric interests. Salvaged columns, statues and a ship's figurehead complete the effect. Today the building operates as a cultural centre with guided visits, and it has become one of Montevideo's most-visited curiosities. The film explores the house room by room, sets it against the smooth modern seafront around it, and considers what happens when a building is designed as a message.