Design mad couple Mary Martin and Carl Turner attempt to build something never seen before amongst the traditional Victorian terraces of Brixton - a home that resembles a giant stack of glass cubes. Minimalism-obsessed Mary and her architect partner Carl have spent years renovating their homes to be as simple to live in as possible. But this project is bigger and more ambitious than anything they've taken on before. On the outside, they want their startling glass structure to become an instant south London landmark. On the inside, a Zen retreat from the noise and chaos of the capital. But to pull it off is going to push their finances to the limit.