Rachel and Ben want to buy a flat in London. And so do their friends, Melanie and Sam. But what with rent, tax, student loans, pensions and bills, it's impossible to save for a deposit. So the foursome come up with a fast-track solution: rent a tiny one bedroom flat between the four of them and split all costs 50/50. It's only for a year after all - a piece of cake. But with paper thin walls and space growing sparser by the day, which will they sacrifice first - the friendship, the relationship, or the dream of buying their own property?