Overview: Guido Heinz Frinken and interior design expert Tine Wittler visit a glass house in Berlin. As the name suggests, it is particularly impressive thanks to its large window fronts. The next house impresses the two of them with its long history - it has stood near Brandenburg since 1760. As befits an old manor house, it has a few surprises in store for the two design professionals. The third property takes Guido and Tine on the water instead of on land: a houseboat that offers everything you could wish for on 100 square meters. Three completely different living concepts, but only one can make it to the final.