This extraordinary documentary tells the harrowing but brutally honest story of Tony and Christine Clark and their two sons Matthew (39) and Michael (42), for the past four decades the two brothers have lived perfectly normal lives but now the two men are like toddlers and unable to look after themselves.

In a cruel twist of faith the two brothers are in the clutches of a condition that’s regressing their brains and their bodies back to childlike state and this is the story of their extraordinary illness and how the Clarke family cope with Matthew and Michaels journey from manhood back to childhood.