Despite living in the same three-flat house in the suburbs of London, the residents are strangers to one another. The bottom floor is home to Tam, a recent ex-cop who spends his days drowning his sorrows in whisky. On the middle floor is Nick, a young man with Asperger's that likes to stick to his schedules and routines. The top floor belongs to Karen, a doctor and researcher that has spent her life trying to understand the rising rates of autism...