Four teams of amateur craftsmen take on the challenge of turning identical residential units into high-quality flats within six weeks. All participants live together on the construction site during this time and renovate the bathroom, kitchen, living room and bedroom. Expert Eva Brenner accompanies them. In each episode, one room is renovated, furnished and finally evaluated by a jury of experts, after which the team with the fewest points leaves the construction site. The winning team, on the other hand, wins a prize of 50,000 euros.