At a time when most have us have too much stuff - with the average Brit owning 1000 items, while checking their phone 200 hundred times a day - what do we really need to be happy? To find out, three households take part in a life changing experiment. For 21 days, all their possessions will be stripped away - even their clothes - and every single item in their home put into storage. They must not buy or borrow anything, apart from food and drink. Carrying on with their daily routine - work, relationships and social lives - they can choose to get back one item a day for 21 days. Will it be shoes or mattress? Phone or pants? When absolutely everything is stripped away, who are they without their possessions?