The Kunsthaus Zürich is Switzerland's largest art museum, but its most gripping story begins not inside its galleries but in a villa three kilometres away.

On a Sunday afternoon in February 2008, three masked men sliced four paintings from their frames in under 90 seconds: a Monet, a Van Gogh, a Degas, and a Cézanne valued at 100 million francs alone. The getaway car's trunk wouldn't close. They left with it open.

The stolen works eventually reached the Kunsthaus, not through any conventional route. Their recovery involved undercover agents, the Pink Panther crime gang, a fake porn kingpin, and a blown tyre in Serbia. Today, the E.G. Bührle Collection sits in the museum's bold angular extension on permanent loan.

VoiceMap's true crime audio tour begins at the Kunsthaus, using the Bührle heist to trace a web of international art theft and the chain of events that brought the paintings back.